APA (7th ed.) Citation

London, J. (1997). The Strength of the Strong. Project Gutenberg.

Chicago Style (17th ed.) Citation

London, Jack. The Strength of the Strong. Project Gutenberg, 1997.

MLA (9th ed.) Citation

London, Jack. The Strength of the Strong. Project Gutenberg, 1997.

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