In text citation in APA style

For secondary sources – perhaps you are citing a work to which you do not have direct access referenced by a third party – you should reference both works in your in-text citation. This applies to both APA 5th and 6th.

For instance, when the original work is a 1995 study by Smith cited in a 2002 work by Brown and Jones, you write:

A study on something (Smith, 1995 as cited in Brown & Jones, 2002).

Smith's study on something (1995 as cited in Brown & Jones, 2002).

Smith's 1995 study on something (as cited in Brown & Jones, 2002).

In your reference list, you should reference the secondary source (Brown & Jones, 2002).