APA (7th ed.) Citation

Irwin, J. H., Stevens, P. R., & Cooley, M. E. (1971). Geology of the Paleozoic rocks, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Irwin, James H., Peter R. Stevens, and M. E. Cooley. Geology of the Paleozoic Rocks, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah. Washington: U.S. Govt. Print. Off, 1971.

MLA (9th ed.) Citation

Irwin, James H., et al. Geology of the Paleozoic Rocks, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah. U.S. Govt. Print. Off, 1971.