APA (7th ed.) Citation

Cohen, C. (1921). A grammar of freethought. Pioneer Press.

Chicago Style (17th ed.) Citation

Cohen, Chapman. A Grammar of Freethought. London: Pioneer Press, 1921.

MLA (8th ed.) Citation

Cohen, Chapman. A Grammar of Freethought. Pioneer Press, 1921.

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