APA in-text citations follow the author-date system:
Author: use last names
Date: use year of publication
Location: part of the source where cited information is located
Pro-Tip #1: Avoid over-citing
When paraphrasing a section of text in more than one sentence, cite the source in the first sentence and don't repeat the citation if the source and topic haven't changed.
Use citations sparingly to illustrate a point or to support an argument you are making. If most of your paper consists of citations from outside sources include more of your own commentary and analysis.
More information about this:
APA Style: Appropriate Level of Citation
Pro-Tip #2: Citing Secondary Sources
A primary source reports original research.
It's is best to find the primary source and cite it directly when you can, rather than using secondary sources.
example: (Savalescu & Kahane, 2009)
A secondary source refers to research reported in another source.
If a primary source is not available, follow the guidelines for citing secondary sources.
example: (Savalescue & Kahane, 2009, as cited in Liao, 2019)
More information about this:
APA Style: Secondary Sources
One author, paraphrase, parenthetical citation with page number:
Pre-implantation genetic diagnosis (PGD) allows prospective parents who are carriers of genetic diseases to select an embryo free of genetic mutations before implanting it (Kitzman, 2020, p. 76).
Two authors, quotation, narrative citation with page number:
Dondorp and de Wert (2019) explained that PGD spares prospective parents the decision of "whether or not to continue the pregnancy if the foetus is diagnosed with the condition that they are at risk of transmitting" (p. 295).
Two authors, paraphrase, parenthetical citation with page number:
In other words, prospective parents are spared the difficult decision to abort the pregnancy if the embryo is diagnosed with the genetic disease they may be transmitting (Dondort & de Wert, 2019, p. 295).
Three or more authors, quotation, narrative citation with page number:
Ravitsky et al. (2015) found that, "language, terminology, and metaphors play a role in framing public debate, policy, and research directions" (p. 57).
Author handle, paraphrase, parenthetical citation with time stamp:
Scientists worry that germline changes may worsen current inequalities because of eugenics and the inevitable discrimination resulting from income disparity (Reactions, 2017, 2:40-2:52).