APA (7th ed.) Citation

U.S. Fish and Wildlife Service. Office of Information Transfer & Purdy, K. G. (1987). A Guide to managing human activity on national wildlife refuges. The Office.

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. Office of Information Transfer and Ken G. Purdy. A Guide to Managing Human Activity on National Wildlife Refuges. Fort Collins, CO: The Office, 1987.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. Office of Information Transfer and Ken G. Purdy. A Guide to Managing Human Activity on National Wildlife Refuges. The Office, 1987.