Question: Quoting a Book's Section Written by a Single Author

F.A.Q. #16

I am a second year English Studies' student in the United Kingdom.  I am currently doing an assignment in literature where I want to reference a book by four authors, A.L Le Quesne, George P. Landow, Stefan Collini and Peter Stansky.  The book is entitled Victorian Thinkers with a section by each author on Carlyle, Ruskin, Arnold and Morris.

I need to reference the section concerning Ruskin (written by Landow) as that is the only section I am concerned with.  Do I still quote all four authors of the book (I mean one author and et al.) but then cite the particular chapter by Landow separately?