APA (7th ed.) Citation

Cohen, C. (2011). A Grammar of Freethought. Project Gutenberg.

Chicago Style (17th ed.) Citation

Cohen, Chapman. A Grammar of Freethought. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Cohen, Chapman. A Grammar of Freethought. Project Gutenberg, 2011.

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