APA (7th ed.) Citation

Park Practice Program (U.S.), National Recreation and Park Association, National Conference on State Parks, & United States. National Park Service. Guideline. National Conference on State Parks.

Chicago Style (17th ed.) Citation

Park Practice Program (U.S.), National Recreation and Park Association, National Conference on State Parks, and United States. National Park Service. Guideline. Washington, D.C.: National Conference on State Parks.

MLA (9th ed.) Citation

Park Practice Program (U.S.), et al. Guideline. National Conference on State Parks.