APA (7th ed.) Citation

United States. National Park Service. (2012). Fort Smith: Fort Smith National Historic Site, Arkansas. National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Fort Smith: Fort Smith National Historic Site, Arkansas. [Washington, D.C.]: National Park Service, 2012.

MLA (8th ed.) Citation

United States. National Park Service. Fort Smith: Fort Smith National Historic Site, Arkansas. National Park Service, 2012.

Warning: These citations may not always be 100% accurate.