APA (7th ed.) Citation

Davidson, G. (2002). Roget's thesaurus of english words and phrases. Penguin books.

Chicago Style (17th ed.) Citation

Davidson, George. Roget's Thesaurus of English Words and Phrases. London: Penguin books, 2002.

MLA (9th ed.) Citation

Davidson, George. Roget's Thesaurus of English Words and Phrases. Penguin books, 2002.