APA (7th ed.) Citation

Colorado Mountain Club, NetLibrary, Inc, Ormes, R. M., & Jacobs, R. (1997). Guide to the Colorado mountains (Rev. 9th ed.). Johnson Books.

Chicago Style (17th ed.) Citation

Colorado Mountain Club, Inc NetLibrary, Robert M. Ormes, and Randy Jacobs. Guide to the Colorado Mountains. Rev. 9th ed. Boulder, Colo: Johnson Books, 1997.

MLA (9th ed.) Citation

Colorado Mountain Club, et al. Guide to the Colorado Mountains. Rev. 9th ed. Johnson Books, 1997.