APA (7th ed.) Citation

Brooks, D. M. (2007). The Necessity of Atheism. Project Gutenberg.

Chicago Style (17th ed.) Citation

Brooks, David Marshall. The Necessity of Atheism. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Brooks, David Marshall. The Necessity of Atheism. Project Gutenberg, 2007.

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