APA (7th ed.) Citation

U.S. Fish and Wildlife Service. (2018). Directory of trails, Don Edwards San Francisco Bay National Wildlife Refuge (Last updated March 1, 2018.). U.S. Fish and Wildlife Service.

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. Directory of Trails, Don Edwards San Francisco Bay National Wildlife Refuge. Last updated March 1, 2018. [Fremont, Calif.]: U.S. Fish and Wildlife Service, 2018.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. Directory of Trails, Don Edwards San Francisco Bay National Wildlife Refuge. Last updated March 1, 2018. U.S. Fish and Wildlife Service, 2018.