APA Citation

Orr, E. L., & Orr, W. N. (2012). Oregon geology (6th ed.). Corvallis: Oregon State University Press.

Chicago Style Citation

Orr, Elizabeth L., and William N. Orr. Oregon Geology. 6th ed. Corvallis: Oregon State University Press, 2012.

MLA Citation

Orr, Elizabeth L., and William N. Orr. Oregon Geology. 6th ed. Corvallis: Oregon State University Press, 2012.

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