APA (7th ed.) Citation

London, J. (2005). The Call of the Wild. Project Gutenberg.

Chicago Style (17th ed.) Citation

London, Jack. The Call of the Wild. Project Gutenberg, 2005.

MLA (9th ed.) Citation

London, Jack. The Call of the Wild. Project Gutenberg, 2005.

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