When quoting material that contains embedded citations, include these citations within the quotation.

Actors "are encouraged to become immersed in a character's life (Stanislavski, 1936/1948,1950), an activity that calls for absorption" (Panero et al., 2016, p. 234).

• If the citation is at the end of the quote, stop the quote before the citation and do not include it.
• Do not include these works in the reference list unless you have used them as primary sources elsewhere in your paper. In the example, Panero et al. (2016) would appear in the reference list, but the Stanislavski citation would not.

Source: APA manual section 8.32