APA (7th ed.) Citation

Emmel, T. C., Minno, M. C., & Drummond, B. A. (1992). Florissant butterflies: A guide to the fossil and present-day species of central Colorado. Stanford University Press.

Chicago Style (17th ed.) Citation

Emmel, Thomas C., Marc C. Minno, and Boyce A. Drummond. Florissant Butterflies: A Guide to the Fossil and Present-day Species of Central Colorado. Stanford, Calif.: Stanford University Press, 1992.

MLA (9th ed.) Citation

Emmel, Thomas C., et al. Florissant Butterflies: A Guide to the Fossil and Present-day Species of Central Colorado. Stanford University Press, 1992.