APA (7th ed.) Citation

Westlake, D. E. (2009). They Also Serve. Project Gutenberg.

Chicago Style (17th ed.) Citation

Westlake, Donald E. They Also Serve. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Westlake, Donald E. They Also Serve. Project Gutenberg, 2009.

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