APA (7th ed.) Citation

Collier, M. (1980). An introduction to Grand Canyon geology. Grand Canyon Natural History Assn.

Chicago Style (17th ed.) Citation

Collier, Michael. An Introduction to Grand Canyon Geology. Grand Canyon, AZ: Grand Canyon Natural History Assn, 1980.

MLA (9th ed.) Citation

Collier, Michael. An Introduction to Grand Canyon Geology. Grand Canyon Natural History Assn, 1980.

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