APA (7th ed.) Citation

(1978). Roget's thesaurus of English words and phrases. Penguin Books.

Chicago Style (17th ed.) Citation

Roget's Thesaurus of English Words and Phrases. England: Penguin Books, 1978.

MLA (9th ed.) Citation

Roget's Thesaurus of English Words and Phrases. Penguin Books, 1978.

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