APA (7th ed.) Citation

(2011). The sentinel. National Park Service, U.S. Department of the Interior.

Chicago Style (17th ed.) Citation

The Sentinel. Manassas, VA: National Park Service, U.S. Department of the Interior, 2011.

MLA (9th ed.) Citation

The Sentinel. National Park Service, U.S. Department of the Interior, 2011.

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