APA (7th ed.) Citation

Twain, M. (2005). In Defense of Harriet Shelley. Project Gutenberg.

Chicago Style (17th ed.) Citation

Twain, Mark. In Defense of Harriet Shelley. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Twain, Mark. In Defense of Harriet Shelley. Project Gutenberg, 2005.

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