APA (7th ed.) Citation

Twain, M. The Entire Project Gutenberg Works of Mark Twain.

Chicago Style (17th ed.) Citation

Twain, Mark. The Entire Project Gutenberg Works of Mark Twain.

MLA (9th ed.) Citation

Twain, Mark. The Entire Project Gutenberg Works of Mark Twain.

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