APA (7th ed.) Citation

Orr, E. L., & Orr, W. N. (1996). Geology of the Pacific Northwest. McGraw-Hill.

Chicago Style (17th ed.) Citation

Orr, Elizabeth L., and William N. Orr. Geology of the Pacific Northwest. New York: McGraw-Hill, 1996.

MLA (8th ed.) Citation

Orr, Elizabeth L., and William N. Orr. Geology of the Pacific Northwest. McGraw-Hill, 1996.

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