APA (7th ed.) Citation

Orr, C. E., & DeVault, M. V. (1959). Geology. Steck.

Chicago Style (17th ed.) Citation

Orr, Catherine Elizabeth, and M. Vere DeVault. Geology. Austin, Tex: Steck, 1959.

MLA (9th ed.) Citation

Orr, Catherine Elizabeth, and M. Vere DeVault. Geology. Steck, 1959.

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