Publication Manual of the American Psychological Association by 
NOTES:
The symbol "&" is used inside parentheses; the word "and" is used in text..
The author's last name and the year of publication should appear in any in-text citation.
Be aware of how to cite a work with multiple authors, and how this format will change after the first citation.
Journal Article Electronic Format from a Research Database
Author, A. A., Author, B. B., & Author, C. C. (Year). Title of article. Title of Periodical, volume number(issue number), pages. https://doi.org/xx.xxx/yyyy
Note: if no DOI number, then use the URL. APA does not require you to list the database name.
Jafari, N., Jafari, N., Vosoughia, S., Utaberta, N., Yunos, M. Y. M., Ismail, N. A., & Ariffin, N. F. M. (2015). Influence of residents' preference of urban agriculture at rooftop garden on awareness about rooftop garden. Advances in Environmental Biology, 9(24), 71+. Retrieved from https://www.scimagojr.com/index.php
Three (3) or twenty (20) authors
List by last names and initials; commas separate author names, while the last author name is preceded again by ampersand.
Jafari, N., Jafari, N., Vosoughia, S., Utaberta, N., Yunos, M. Y. M., Ismail, N. A., & Ariffin, N. F. M. (2015). Influence of residents' preference of urban agriculture at rooftop garden on awareness about rooftop garden. Advances in Environmental Biology, 9(24), 71+. Retrieved from https://www.scimagojr.com/index.php
[note: the second and third line of a citation should have a hanging indent of .5]
Website
A webpage or online content
Lastname, F. M. (Year, Month Date). Title of page. Site name. URL
Johnson, B. (2020, June 11). Racial & Food Justice — A Resource. The Cornell Daily Sun. https://cornellsun.com/2020/06/11/racial-food-justice-a-resource/
[note: the second and third line of a citation should have a hanging indent of .5]
Group or organization
Group name. (Year, Month Date). Title of page. Site name. URL
Environmental Protection Agency (2016, June 27). Using green roofs to reduce heat islands. https://www.epa.gov/heat-islands/using-green-roofs-reduce-heat-islands
Book
Author, A. A. (Year of publication). Title of work: Capital letter also for subtitle. Publisher Name.
Novak, A. (2016). The rooftop growing guide: how to transform your roof into a vegetable garden or farm. Ten Speed Press.
The Purdue Online Writing Lab (OWL) offers a APA Formatting and Style Guide.
Use Purdue OWL for help with: