APA (7th ed.) Citation

Roget, P. M., & Roget, S. R. (1979). Roget's thesaurus of English words and phrases. Portland House.

Chicago Style (17th ed.) Citation

Roget, Peter Mark, and Samuel Romilly Roget. Roget's Thesaurus of English Words and Phrases. New York: Portland House, 1979.

MLA (9th ed.) Citation

Roget, Peter Mark, and Samuel Romilly Roget. Roget's Thesaurus of English Words and Phrases. Portland House, 1979.

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