APA (7th ed.) Citation

Geronimo & Barrett, S. M. (2010). Geronimo's Story of His Life. Project Gutenberg.

Chicago Style (17th ed.) Citation

Geronimo and S. M. Barrett. Geronimo's Story of His Life. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Geronimo and S. M. Barrett. Geronimo's Story of His Life. Project Gutenberg, 2010.

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