United States. National Park Service. Areas administered by the National Park Service and related properties as of January 1, 1968.
Chicago Style (17th ed.) CitationUnited States. National Park Service. Areas Administered by the National Park Service and Related Properties as of January 1, 1968.
MLA (9th ed.) CitationUnited States. National Park Service. Areas Administered by the National Park Service and Related Properties as of January 1, 1968.
Warning: These citations may not always be 100% accurate.