APA (7th ed.) Citation

Leonard, R. E., Spencer, E. L., & Plumley, H. J. (1980). Guidelines for backcountry facilities: Design and maintenance. Appalachian Mountain Club.

Chicago Style (17th ed.) Citation

Leonard, R. E., E. L. Spencer, and H. J. Plumley. Guidelines for Backcountry Facilities: Design and Maintenance. [Boston]: Appalachian Mountain Club, 1980.

MLA (9th ed.) Citation

Leonard, R. E., et al. Guidelines for Backcountry Facilities: Design and Maintenance. Appalachian Mountain Club, 1980.