Start with each author's last name, followed by a comma and the first and middle initials (or just the first initial if that is all that is provided). Separate each author with a comma, and include the ampersand (&) before the last name in the list. When creating a reference for a work with two group authors, use an ampersand, not a comma to separate them (as you would with two individual authors).
List authors' names in the order in which they appear on the publication. The order of names often carries significance, so it is important not to change the order in your listing. To be listed as first author for a publication usually means that person is the lead researcher on the project.
Severino, C., & Knight, M.
Graves, S. J., Anders, K. C., & Balester, V. M.
American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.).
U.S. Department of Health and Human Services.
Note that when multiple layers of government agencies are listed as authors in a work, use just the most specific author in the reference.
Instead of “U.S. Department of Health and Human Services, National Institutes of Health, National Heart, Lung, and Blood Institute,” use the most specific author.
When creating a reference for a work with multiple authors, provide surnames and initials for up to 20 authors. For sources with 21 or more authors, use ellipsis points after the name of the 19th author, followed by the final author's surname and initials.
Steyer, T., Ortiz, K., Schemmel, L., Armstrong, B., Hicks, L., Simac, M., Perez, K., Nyung, J., Schlenz, W., Robins, K., O’Neil, O., Muhammad, E., Moore, J. L., Rosinski, P., Peeples, T., Pigg, S., Rife, M. C., Brunk-Chavez, B.,Tasaka, R. Curtis, F.
When providing a reference entry to a whole edited collection, list the editors at the beginning of the entry and include the abbreviation Ed. (for one editor) or Eds. (for two or more editors) in parentheses after the names.