APA Style

Roget, P, M. ([Check the copyright). Roget's Thesaurus ([Not specified; you may need to check the title pa). London (based on common Pengui: Penguin Books.

MLA Style

Roget, Peter, Mark. "Roget's Thesaurus". [Not specified; you may need to check the title pa London (based on common Pengui: Penguin Books, [Check the copyright. BOOK.