APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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