APA (7th ed.) Citation

Onions, O. (2011). The Story of Louie. Project Gutenberg.

Chicago Style (17th ed.) Citation

Onions, Oliver. The Story of Louie. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Onions, Oliver. The Story of Louie. Project Gutenberg, 2011.

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