United States. National Park Service. Areas administered by the National Park Service: And related properties as of January 1, 1972.
Chicago Style (17th ed.) CitationUnited States. National Park Service. Areas Administered by the National Park Service: And Related Properties as of January 1, 1972.
MLA (9th ed.) CitationUnited States. National Park Service. Areas Administered by the National Park Service: And Related Properties as of January 1, 1972.
Warning: These citations may not always be 100% accurate.