APA Citation

Princeton Language Institute. (2005). Roget's 21st century thesaurus: In dictionary form. New York: A Dell Book Pub..

Chicago Style Citation

Princeton Language Institute. Roget's 21st Century Thesaurus: In Dictionary Form. New York: A Dell Book Pub., 2005.

MLA Citation

Princeton Language Institute. Roget's 21st Century Thesaurus: In Dictionary Form. New York: A Dell Book Pub., 2005.

Warning: These citations may not always be 100% accurate.