APA (7th ed.) Citation

Whistler, J. M. (2008). The Gentle Art of Making Enemies. Project Gutenberg.

Chicago Style (17th ed.) Citation

Whistler, James McNeill. The Gentle Art of Making Enemies. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Whistler, James McNeill. The Gentle Art of Making Enemies. Project Gutenberg, 2008.

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