APA (7th ed.) Citation

Higgins, C. A. L. Titan of Chasms: The Grand Canyon of Arizona.

Chicago Style (17th ed.) Citation

Higgins, C. A.; Lummis. Titan of Chasms: The Grand Canyon of Arizona.

MLA (9th ed.) Citation

Higgins, C. A.; Lummis. Titan of Chasms: The Grand Canyon of Arizona.

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