I have a 2 author book who are using another authors "process" to explain a concept. We must use this other author process as the central theme of our paper. I have the book and 2 authors already on my Bib and cited in my paper. How do I cite this other author and do I add just this section to my Bib?

So the Book is Leadership A Communication Perspective by M. Hackman and C. Johnson. Pages 106-107 talk about George Graham Wallas and his 4 items in the creative process.

Question

I have a 2 author book who are using another authors "process" to explain a concept.  We must use this other author process as the central theme of our paper.  I have the book and 2 authors already on my Bib and cited in my paper.  How do I cite this other author and do I add just this section to my Bib?

So the Book is Leadership A Communication Perspective by M. Hackman and C. Johnson.  Pages 106-107 talk about George Graham Wallas and his 4 items in the creative process.