APA (7th ed.) Citation

Twain, M. (2004). Life on the Mississippi by Mark Twain. Project Gutenberg Literary Archive Foundation.

Chicago Style (17th ed.) Citation

Twain, Mark. Life on the Mississippi by Mark Twain. Salt Lake City: Project Gutenberg Literary Archive Foundation, 2004.

MLA (9th ed.) Citation

Twain, Mark. Life on the Mississippi by Mark Twain. Project Gutenberg Literary Archive Foundation, 2004.

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