The author must download the following form from the journal's website, complete it, and attach it to his or her contribution:

• Application for article review. Declaration of individual or collective authorship (in the case of works completed by more than one author); each author or co-author must certify that they have directly contributed to the intellectual development of the work and that they approve it for blind peer review and, if applicable, publication. Declaration that the submitted manuscript is unpublished and not under review by any other publication. Information: name, academic degree, institution where they work, address, telephone number, email address.
• Brief resume of the author not exceeding 5 lines, on a separate sheet.
• The work and documents requested above should be sent to the email address: editor@revistaalfa.org
• Submissions must be submitted in letter size, using 12-point Arial font, in one column, and in upper and lower case.
• The title must be trilingual (Spanish, English, and Portuguese) and may not exceed 15 words.
• Each contribution must be accompanied by a summary in Spanish that does not exceed 150 words, with five to six keywords that are included in the IRESIE controlled vocabulary, plus the translation of that summary into English (abstract) with its corresponding keywords and Portuguese Resumo (note the correct way to write this term).
• Keywords will be presented in alphabetical order. All papers must have conclusions.
• Graphic elements (charts, graphs, diagrams, drawings, photographs) must be numbered in the order of appearance and in the appropriate place within the body of the text, with their respective fonts at the bottom and their original programs. That is, they should not be inserted into the text in image format.
• Photographs must have a minimum resolution of 300 dpi and be 140 mm wide.
• Texts and comments are not allowed as footnotes. Anything presented in this way must be incorporated into the text in an appropriate manner.
• The list of bibliographic references should also be structured according to the Vancouver style.
• Every article in a digital journal must have the corresponding DOI, and texts taken from editable web pages must have the retrieval date added. Some examples are provided below.

Citation System

The journal's citation system is numerical, in parentheses.

• The journal's citation system is numerical, in parentheses.

Example: Jones (8) has argued that…

• References are numbered consecutively in the order in which they are first used in the text. Full citations will be included in the Reference List at the end of your document, with matching numbers identifying each reference.
• When citing multiple references together, use a hyphen to indicate a series of inclusive numbers. Use commas to indicate a series of non-inclusive numbers. The notation with these references (4, 5, 6, 7, 14, 19) is abbreviated as (4-7, 14, 19).

Example: Multiple clinical trials (4-6,9) show...

• The original number used for a reference is reused each time the reference is cited.

Example: "...the theory was first presented by Lee (7) in 1999, but there was disagreement (3,5,8) about its significance."

• Include the page number for any direct quotes or specific ideas.

Example: "...has been proven to be false." (4, p23)

• The parenthetical citation is placed after any comma and period, and before any other period and semicolon.

Example: ... a new definition. (13, p111-2)... this option is preferred (11);

• Do not use superscripts or subscripts to write the respective citation.
• When references are placed at the end of the paragraph, they must be placed before the full stop: (8).
• Do not use underlining of any kind.
• A publication and its author(s) will be cited only once. Do not use multiple citations from the same publication with the term Op. cit.
• Texts and comments are not allowed as footnotes. Anything presented in this way must be incorporated into the text in an appropriate manner.
• Do not place citations in the form of endnotes.
• When citing a study, mention only the surname of the first author, without adding et al or col.
• Quotes from other quotes are not allowed. Ex: 8. Cited by Comte: Chedwin R. Scientific disciplines....

Indirect Citations

An indirect source is when an author cites another author's work in the text. These types of citations are generally not accepted in Vancouver Style, so ask your instructor for permission. Include the author and date of the original source in the text. Use "as cited in" or "as discussed in" to indicate where you found the quote, and provide the citation to that reference.

Example: James Wallace (2001) argued (cited by 5, p26), that...

Bibliographical References

Only published material is referenced. Authors are expected to reference material published in journals in Bolivia and Latin America, including the ALFA Journal of Agricultural and Veterinary Sciences.

The reference list should be placed on a separate sheet at the end of the article, in the same numerical order in which they were cited. References should not be numbered automatically or bulleted, and the authors should ensure that this is the case. The reference number should be included directly, with no additional references.

Strictly apply the following instructions

Journal articles: Provide the first name and initials of each author's name. Do not use a "," between the last name and initials. Include the article title, journal name, publication year (followed by ";"), volume, number in parentheses (if necessary), and page numbers. Include only six authors, and if there are more than six, include the abbreviation "et al." after the sixth author. Do not include "and" before the last author.

Examples: Journal Articles: Journal articles can be accessed in three different ways:

(1) From the printed copy (on paper); (2) from the journal's website; or (3) from an online article database such as Medline. You will cite the article differently depending on how you accessed it.

Standard format for journal articles: Author's initials; Article title; Abbreviated journal title. Publication date: Volume number (issue number): page numbers.

Find the journal abbreviation

The Vancouver style does not use the journal full name, only the commonly accepted abbreviation: for example, New England Journal of Medicine is cited as N Engl J Med. If the abbreviation is not provided, use the PubMed Journals database to find the appropriate abbreviation: https://goo.gl/4T4rpn.

Books

Provide the first name and initials of each author or editor. Do not use a "," between the last name and initials. Provide the book title, edition number, place, publisher, (before the date, place ";"), and, if necessary, the page number after the abbreviation (e.g., "p. 111").

Standard format for books: Author Last Initial. Title: Subtitle. Edition (if not the first). Place of publication: Publisher; Year. Book with a specific author or editor.

Book with an author or editor

1. Mason J. Concepts in Dental Public Health. Philadelphia: Lippincott Williams and Wilkins; 2005.
2. Ireland R, editor. Clinical Textbook of Dental Hygiene and Therapy. Oxford: Blackwell Munksgaard; 2006.

Two-Six Authors / Editors

3. Miles DA, Van Dis ML, Williamson GF, Jensen CW. Radiographic Imaging for the Dental Team. 4th ed. St. Louis: Saunders Elsevier; 2009.
4. Dionne RA, Phero JC, Becker DE, editors. Management of pain and anxiety in the dental office. Philadelphia: WB Saunders; 2002.

More than Six Authors / Editors

5. Fauci AS, Braunwald E, Kasper DL, Hauser SL, Longo DL, Jameson JL, et al., editors. Harrison's principles of internal medicine. 17th ed. New York: McGraw Hill; 2008.

Organization as author

6. Canadian Dental Hygienists Association. Dental hygiene: definition and scope. Ottawa: Canadian Dental Hygienists Association; 1995.

No Author / Editor

7. Scott's Canadian Dental Directory 2008. Ninth Edition. Toronto: Scott Directories; 2007.

Government document

8. Environmental Health Authority. Radiation protection in dentistry: recommended safety procedures for the use of dental X-ray equipment. Safety Code 30. Ottawa: Ministry of Health; 2000.

Chapter in a book

9. Alexander RG. Considerations for creating a beautiful smile. In: Romano R, editor. The Art of the Smile. London: Quintessence Publishing; 2005. pp. 187–210.

Websites

The provided internet address must be verified to be active and accessible; otherwise, it must be deleted.

10. Irfan A. Protocols for predictable aesthetic dental restorations [Internet]. Oxford: Blackwell Munksgaard; 2006 [cited 2009 May 21]. Available from:https ://goo.gl/WvRuC3.
11. Irfan A. Protocols for predictable aesthetic dental restorations [Internet]. Oxford: Blackwell Munksgaard ​2006 [cited May 21, 2009]. Available at: https://goo.gl/WvRuC3.

Journal article in print

12. Haas AN, de Castro GD, Moreno T, Susin C, Albandar JM, Oppermann RV, et al. Azithromycin as adjunctive treatment for aggressive periodontitis: a 12-month randomized clinical trial. J Clin Periodontol. 2008 August; 35(8):696-704.

Journal article from a website

13. Tasdemir T, Yesilyurt C, Ceyhanli KT, Celik D, Er K. Evaluation of apical filling after root canal filling using two different techniques. J Can Dent Assoc [Internet]. April 2009 [cited June 14, 2009]; 75 (3): [approximately 5pp.]. Available at: https://goo.gl/fRH8sU

Online database

14. Erasmus S, Luiters S, Brijlal P. Oral hygiene and dental student's knowledge, attitude and behavior in managing HIV/AIDS patients. Int J Dent Hyg [Internet]. 2005 Nov [cited 2009 Jun 16]; 3 (4):213-7. Available from Medline: https://goo.gl/Je6xKH
15. Monajem S. Integration of oral health into primary health care: the role of dental hygienists and the WHO stewardship. Int J Dent Hyg [Internet]. 2006 Feb cited 2009 Jun 21]; 4 (1): 47-52. Available from CINAHL with Full Text: http://tinyurl.com/kudbxw

Website with author

16. Fehrenbach MJ. Dental Hygiene Education [Internet]. [Location unknown]: Fehrenbach & Associates; 2000 [updated May 2, 2009; cited June 15, 2009]. Available at: http://www.dhed.net/Main.html

Website without author

17. American Dental Hygienists' Association [Internet]. Chicago: American Dental Hygienists' Association; 2009 [cited 2009 May 30]. Available at: http://www.adha.org/

Part/Article within a website

18. Medline Plus [Internet]. Bethesda, MD: U.S. National Library of Medicine; c2009. Dental Health; 2009 May 2006 [cited 2009, June 16]; [about 7 screens]. Available from: https://goo.gl/3jGhzM

Blog

19. Skariah H. The Dental Booth Dental Blog [Internet]. Mississauga (ON): Hans Skariah; 2004 - [cited 2009 June 20]. Available from: http://dentaldude.blogspot.com/

Article within a blog

20. Skariah H. The Dental Booth Dental Blog [Internet]. Mississauga (ON): Hans Skariah; 2004. Dental Did You Know: Breastfeeding Duration and Non-nutritive Sucking Habits; 2009 May 18 [cited 2009 June 20]; [about 1 screen]. Available from: https://goo.gl/ygF2XJ.

Image on the Internet

21. McCourtie SD, World Bank. SDM-LK-179 [image online]. 2009, April 29 [cited 2009, June 14]. Available at: https://goo.gl/e4fruq.

Newspaper articles

22. Fayerman P. Women now have to wait until 40 for publicly paid amnio testing. Vancouver Sun. 2009 June 9; Sect. A: 5.
23. Health Canada issues warning about fake toothbrushes. Globe and Mail [Internet]. 2009 April 10 [cited 2009 June 23]. Available from: https://goo.gl/XXdokF.
24. Waldman D. Mouth is 'window on the rest of the body': Oral health, dental hygiene is linked to more than just the teeth, the gums . National Post [Internet]. 2009, April 14 [cited 2009, June 22]. Available at Canadian Newsstand : https://goo.gl/VvLRzw

Video recordings

25. Dental dam: still the best dry-field technique [DVD]. Provo (UT): Practical Clinical Courses; 2007.
26. Cuaron A, director; Abraham M, producer. Children of men [DVD]. Universal City (CA): Universal; 2006.

Personal communications

Personal communications should be indicated in the body of the text. Include the person´s name providing the communication and the words "personal communication" in parentheses, followed by the institution to which it belongs and the date. Do not use footnotes for personal communications.

Personal communications (except for email) should not be included in the Reference List, as they are unpublished and cannot be easily traced by the reader. Instead, acknowledge personal conversations and letters within the text in parentheses.

27. Conversation: "...in a conversation with a fellow student from the Dental Hygiene Program (Affleck, Ben. Conversation with: Matt Damon. 2008 Sep 07.)."
28. Personal letter: "...this information was later confirmed in a letter (Hepburn, Katherine. Letter to: Spencer Tracy. 2005 Mar. 03. 4 pages.)."

E-mail

Email correspondence is included in the Reference List as emails are easy to trace and date.

29. Bloom, Orlando. Searching Medline for dental hygiene articles [Internet]. Message to: Johnny Depp. 2008 Nov 11 [cited 2009 Jun 22]. [3 paragraphs].

Unpublished undergraduate theses

They are not included as reference material but may be cited by placing the respective information as a footnote, as follows:

• 1 Escudero I, [Accessibility of the dispersed rural communities of Meridian and Playa Rica to the outpatient service of the Nanegal Health Center – June to December 2016] Master's thesis in Public Health [2018]. Located at: Pontifical Catholic University of Ecuador

Do not include as a reference:

• Unpublished documents or abstracts, even if they have been presented at conferences or congresses.
• Articles submitted for publication, which have not been accepted.
• Book reviews.

The reference for "in press" material must include the journal´s name that accepted it and the volume, issue number, or estimated publication date. If this date is prior to the publication date in the ALFA Journal of Agricultural and Veterinary Research Sciences, the exact reference will be requested.

The appropriate way to present as a reference other types of material not considered above should be consulted on the Internet sites already indicated.

For evaluation purposes on indexing platforms, the manuscript's references must be free of formatting errors. Otherwise, the material will be returned.