APA (7th ed.) Citation

Four Corners Geological Society, Fassett, J. E., & Wengerd, S. A. (1975). Canyonlands country. The Society.

Chicago Style (17th ed.) Citation

Four Corners Geological Society, James E. Fassett, and Sherman A. Wengerd. Canyonlands Country. [Durango, Colo.]: The Society, 1975.

MLA (9th ed.) Citation

Four Corners Geological Society, et al. Canyonlands Country. The Society, 1975.