United States. National Park Service. (2013). Effigy Mounds National Monument, Iowa: Final general management plan/environmental impact statement. National Park Service, U.S. Department of the Interior.
Chicago Style (17th ed.) CitationUnited States. National Park Service. Effigy Mounds National Monument, Iowa: Final General Management Plan/environmental Impact Statement. [Washington, DC]: National Park Service, U.S. Department of the Interior, 2013.
MLA (9th ed.) CitationUnited States. National Park Service. Effigy Mounds National Monument, Iowa: Final General Management Plan/environmental Impact Statement. National Park Service, U.S. Department of the Interior, 2013.
Warning: These citations may not always be 100% accurate.