Citation Question

As I'm writing a literature review I'm reading another review paper (Paper A) and found a citation to a source (Paper B) that makes a point I want to incorporate in to my own work. I've tracked down that source (Paper B) and agree with the way it was paraphrased in Paper A. How do I ethically and accurately cite this in my own work using APA? [more inside]
posted by codacorolla on Nov 16, 2012 - 12 answers