APA (7th ed.) Citation

Lageson, D. R., Lester, A., & Trudgill, B. (1999). Colorado and adjacent areas. Geological Society of America.

Chicago Style (17th ed.) Citation

Lageson, David R., Alan Lester, and Bruce Trudgill. Colorado and Adjacent Areas. Boulder, Colo.: Geological Society of America, 1999.

MLA (9th ed.) Citation

Lageson, David R., et al. Colorado and Adjacent Areas. Geological Society of America, 1999.