If at all possible, find and cite the original source directly. If you can't find the original source, cite the source that you found in your References list, and use "as cited in" in your in-text citation to that source. For example, if you read a work by Lyon et al. (2014) in which Rabbit (1982) was cited, and you were unable to read Rabbitt's work yourself, your in-text citation would look like this, and you would only include Lyon's source in your References list:
(Rabbitt, 1982, as cited in Lyon et al., 2014).
For more details, see Section 8.6 of the 7th edition of the APA Manual, or consult the APA's online guide: https://apastyle.apa.org/style-grammar-guidelines/citations/secondary-sources
Full-text journal article from a database:
Owens, H., Christian, B., & Polivka, B. (2017). Sleep behaviors in traditional-age college students: A state of the science
review with implications for practice. Journal of the American Association of Nurse Practitioners, 29(11),
695-703. http://dx.doi.org/10.1002/2327-6924.12520
Ebook:
Burgess, R. (2019). Rethinking global health: Frameworks of power. Routledge.
Website:
Centers for Disease Control and Prevention. (2021, November 18). People at high risk of developing flu-related
complications. https://www.cdc.gov/flu/highrisk/index.htm
Provide surnames and initials for up to and including 20 authors. When there are two to 20 authors, use an ampersand before the final author's name. When there are 21 or more authors, include the first 19 author's names, insert an ellipsis (but no ampersand), and then add the final author's name.
In-text citations:
Reference list:
Vos, T., Lim, S. S., Abbafati, C., Abbas, K. M., Abbasi, M., Abbasifard, M., Abbasi-Kangevari, M., Abbastabar, H., Abd-Allah, F., Abdelalim, A., Abdollahi, M., Abdollahpour, I., Abolhassani, H., Aboyans, V., Abrams, E. M., Abreu, L. G., Abrigo, M. R. M., Abu-Raddad, L. J., Abushouk, A. I., … Murray, C. J. L. (2020). Global burden of 369 diseases and injuries in 204 countries and territories, 1990–2019: A systematic analysis for the Global Burden of Disease Study 2019. The Lancet, 396(10258), 1204–1222. https://doi.org/10.1016/S0140-6736(20)30925-9
Book:
Coltrane, S. (1998). Gender and families. Pine Forge Press.
Book with two authors:
Goulding, M., & Mahar, D. (1996). Floods of fortune: Ecology and economy along the Amazon. Columbia University Press.
Journal article:
Egan, S. E., & Perry, D. G. (2001). Gender identity: A multidimensional analysis with implications for psychosocial
adjustment. Developmental Psychology, 37(4), 451-464. https://doi.org/10.1037/0012-1649.37.4.4514
Essay in a multivolume work (each volume with a unique title):
Bloom, L. Z. (1985). Maya Angelou. In T. M. Davis & T. Harris (Eds.), Dictionary of literary biography: Vol 38
Afro-American writers after 1955: Dramatists and prose writers. Gale.
Article in a reference work:
Diabetes. (2000). In The Columbia encyclopedia (6th ed., p. 2533). New York, NY: Columbia University Press.