APA (7th ed.) Citation

Four Corners Geological Society & Baars, D. L. (1973). Geology of the canyons of the San Juan River. Four Corners Geological Society.

Chicago Style (17th ed.) Citation

Four Corners Geological Society and Donald L. Baars. Geology of the Canyons of the San Juan River. Durango, Colo.: Four Corners Geological Society, 1973.

MLA (9th ed.) Citation

Four Corners Geological Society and Donald L. Baars. Geology of the Canyons of the San Juan River. Four Corners Geological Society, 1973.