Here are a few key concepts to get you started in the complex world of referencing another person's material.
Plagiarism vs Homage
Parody vs Homage
Legal Issues of Writing a Parody
Character Names and Homage
Note that I am not a lawyer, so if you are working on a book which has substantial references to another brand, product, or work, it would be wise for you to consult with a lawyer before that book gets published and seen by others.
Lisa Shea's Editing Services
Lisa Shea Free Ebooks
Lisa Shea Full Library of Published Books
Getting Your Book Published
Writing Tips and Online Books
Lisa Shea Medieval Romance Novels
Online Literary Magazines
Lisa Shea's Homepage