APA (7th ed.) Citation

National Historic Landmarks Survey (U.S.) & National Historic Landmarks Program (U.S.). List of national historic landmarks by state. U.S. Dept. of the Interior, National Park Service.

Chicago Style (17th ed.) Citation

National Historic Landmarks Survey (U.S.) and National Historic Landmarks Program (U.S.). List of National Historic Landmarks by State. Washington, DC: U.S. Dept. of the Interior, National Park Service.

MLA (9th ed.) Citation

National Historic Landmarks Survey (U.S.) and National Historic Landmarks Program (U.S.). List of National Historic Landmarks by State. U.S. Dept. of the Interior, National Park Service.