APA (7th ed.) Citation

Twain, M., & Widger, D. (2009). The Works Of Mark Twain An Index of all Project Gutenberg Editions. Project Gutenberg.

Chicago Style (17th ed.) Citation

Twain, Mark, and David Widger. The Works Of Mark Twain An Index of All Project Gutenberg Editions. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Twain, Mark, and David Widger. The Works Of Mark Twain An Index of All Project Gutenberg Editions. Project Gutenberg, 2009.

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