APA (7th ed.) Citation

Thornberry, T. L. (2010). Valley Forge National Historical Park: Geologic resources inventory report. Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center.

Chicago Style (17th ed.) Citation

Thornberry, Trista L. Valley Forge National Historical Park: Geologic Resources Inventory Report. Denver, Colorado : Ft. Collins, Colorado: Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2010.

MLA (9th ed.) Citation

Thornberry, Trista L. Valley Forge National Historical Park: Geologic Resources Inventory Report. Geologic Resources Division, Natural Resource Program Center ; U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2010.