APA Style

MAWSON, C, O, S. (1931). Roget's Thesaurus of the English Language in Dictionary Form (2). New York: Garden City Publishing Company, Inc..

MLA Style

MAWSON, C., O., SYLVESTER. "Roget's Thesaurus of the English Language in Dictionary Form". 2 New York: Garden City Publishing Company, Inc., 1931. Text.