How to cite secondary sources in APA style?

Hello everyone,

for my thesis I need to cite a few sources I don’t have the original for; thus, I can just cite the secondary source I actually read. APA suggests citing secondary sources in text like this:

(Rabbitt, 1982, as cited in Lyon et al., 2014)

The primary source is not part of my bibliography file because I didn’t read it.
A combination of different citation styles

(Rabbitt, 1982; as cited in #cite(<Lyon_2014>, form: "author"), #cite(<Lyon_2014>, form: "year"))

works partially but fails when I cite multiple works from the same author and year when
Lyon et al., 2014a and Lyon et al., 2014b are needed.

Is there another way or a workaround for this problem?

Kind regards