APA (7th ed.) Citation

National Wildlife Refuge System (U.S.). (1998). Primitive walking trails. U.S. Dept. of the Interior, U.S. Fish & Wildlife Service.

Chicago Style (17th ed.) Citation

National Wildlife Refuge System (U.S.). Primitive Walking Trails. [Washington, D.C.]: U.S. Dept. of the Interior, U.S. Fish & Wildlife Service, 1998.

MLA (9th ed.) Citation

National Wildlife Refuge System (U.S.). Primitive Walking Trails. U.S. Dept. of the Interior, U.S. Fish & Wildlife Service, 1998.