how to reference within a reference

Allport’s diary (as cited in Nicholson, 2003).
For example, if Allport’s work is cited in Nicholson and you did not read Allport’s work, list the Nicholson reference in the reference list. In the text, use the following citation:

Citing a source that you found in another source is known as using a secondary source.
In your reference list you should provide the details of the secondary source (the source you read). In this example: the details of Kersten 1987.

Example 2 Journal article
(Fong, cited in Bertram 1997)

TV Series Episode: See our APA Guide Example
Movie Reference: See our APA Guide Example

Don’t repeat name(s), earliest year first:
(Alibali, 1999, 2005)

References:

http://www.wur.nl/en/article/How-do-I-cite-a-source-I-found-in-another-source.htm
http://libguides.scu.edu.au/harvard/secondary-sources
http://rasmussen.libanswers.com/faq/32516
http://writing.wisc.edu/handbook/documentation/docapa/docapacitations_multiple/
http://www.reddit.com/r/smallbusiness/comments/503aou/how_to_formally_get_a_trade_reference_from_one_of/