APA (7th ed.) Citation

Roget, P. M. (1991). Roget's thesaurus by Peter Mark Roget. Project Gutenberg Literary Archive Foundation.

Chicago Style (17th ed.) Citation

Roget, Peter Mark. Roget's Thesaurus by Peter Mark Roget. Salt Lake City: Project Gutenberg Literary Archive Foundation, 1991.

MLA (9th ed.) Citation

Roget, Peter Mark. Roget's Thesaurus by Peter Mark Roget. Project Gutenberg Literary Archive Foundation, 1991.

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