APA (7th ed.) Citation

Kolb, E. L., & Wister, O. (2004). Through the Grand Canyon from Wyoming to Mexico. Project Gutenberg.

Chicago Style (17th ed.) Citation

Kolb, E. L., and Owen Wister. Through the Grand Canyon from Wyoming to Mexico. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Kolb, E. L., and Owen Wister. Through the Grand Canyon from Wyoming to Mexico. Project Gutenberg, 2004.

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