APA (7th ed.) Citation

Unrau, H. D., & United States. National Park Service. (1988). Crater Lake National Park, Oregon. U.S. Dept. of the Interior, National Park Service.

Chicago Style (17th ed.) Citation

Unrau, Harlan D., and United States. National Park Service. Crater Lake National Park, Oregon. [Denver, Colo.?]: U.S. Dept. of the Interior, National Park Service, 1988.

MLA (8th ed.) Citation

Unrau, Harlan D., and United States. National Park Service. Crater Lake National Park, Oregon. U.S. Dept. of the Interior, National Park Service, 1988.