APA (7th ed.) Citation

Twain, M. (2005). On the Decay of the Art of Lying. Project Gutenberg.

Chicago Style (17th ed.) Citation

Twain, Mark. On the Decay of the Art of Lying. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Twain, Mark. On the Decay of the Art of Lying. Project Gutenberg, 2005.

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