APA (7th ed.) Citation

Simmons, G. A., & Cannon, E. C. (1991). It is outdoors: A guide to experiential activities. The Association.

Chicago Style (17th ed.) Citation

Simmons, G. A., and E. C. Cannon. It Is Outdoors: A Guide to Experiential Activities. Reston, VA: The Association, 1991.

MLA (9th ed.) Citation

Simmons, G. A., and E. C. Cannon. It Is Outdoors: A Guide to Experiential Activities. The Association, 1991.