U.S. Fish and Wildlife Service. Division of Endangered Species & U.S. Fish and Wildlife Service. (1993). Endangered and threatened wildlife and plants: 50 CFR 17.11 & 17.12 : August 23, 1993. [Available from the Publications Unit, U.S. Fish and Wildlife Service].
Chicago Style (17th ed.) CitationU.S. Fish and Wildlife Service. Division of Endangered Species and U.S. Fish and Wildlife Service. Endangered and Threatened Wildlife and Plants: 50 CFR 17.11 & 17.12 : August 23, 1993. [Washington, D.C.]: [Available from the Publications Unit, U.S. Fish and Wildlife Service], 1993.
MLA (9th ed.) CitationU.S. Fish and Wildlife Service. Division of Endangered Species and U.S. Fish and Wildlife Service. Endangered and Threatened Wildlife and Plants: 50 CFR 17.11 & 17.12 : August 23, 1993. [Available from the Publications Unit, U.S. Fish and Wildlife Service], 1993.