Referencing Help

Ok what I am trying to do is a bit complicated, but I want to reference a source which has been cited in one of the sources I am using, but because I have not read the source being cited I cannot directly include that source in my bibliography, however I need to display where the particular bit of information has come from. 

I.e. (BOB, 2005: BILL, 2013)

Hope that convoluted explanation is sufficient?

Thanks in advance.

Tom

It probably depends on the Style guide.  For example: https://owl.english.purdue.edu/owl/resource/560/09/ says to do this for APA –

Work Discussed in a Secondary Source

List the source the work was discussed in:

Coltheart, M., Curtis, B., Atkins, P., & Haller, M. (1993). Models of reading aloud: Dual-route and parallel-distributed-processing approaches. Psychological Review, 100, 589-608.

 

NOTE: 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, 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, Curtis, Atkins, & Haller, 1993), …