Quoting from the Purdue OWL APA site:
"Give the secondary source in the references list; in the text, name the original work, and give a citation for the secondary source. For example, if Seidenberg and McClelland's work is cited in Coltheart et al. and you did not read the original work [by Seidenberg & McClelland], list the Coltheart et al. reference in the References. In the text, use the following citation:
In Seidenberg and McClelland's study (as cited in Coltheart et al.,1993), it was found that..."
In your list of references at the end of your paper, give the reference for Coltheart, but not for Seidenberg.
NOTE: The APA Manual, 7th ed. (2020) states "Cite secondary sources sparingly--for instance, when the original work is out of print, unavailable, or available only in a language you do not understand. If possible, as a matter of good scholarly practice, find the primary source, read it and cite it directly rather than citing a secondary source" (p. 258). More information about citing secondary sources is available on the APA Style Blog.
