APA (7th ed.) Citation

George Davidson. (2019). Roget's thesaurus of english words and phrases. Penguin Books.

Chicago Style (17th ed.) Citation

George Davidson. Roget's Thesaurus of English Words and Phrases. London: Penguin Books, 2019.

MLA (9th ed.) Citation

George Davidson. Roget's Thesaurus of English Words and Phrases. Penguin Books, 2019.

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