APA (7th ed.) Citation

Von Loh, J., & Cogan, D. (2011). Vegetation classification list update for Big Bend National Park and Rio Grande National Wild and Scenic River. U.S. Department of the Interior, National Park Service, Natural Resource Program Center.

Chicago Style (17th ed.) Citation

Von Loh, James, and Dan Cogan. Vegetation Classification List Update for Big Bend National Park and Rio Grande National Wild and Scenic River. Fort Collins, Colorado: U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011.

MLA (9th ed.) Citation

Von Loh, James, and Dan Cogan. Vegetation Classification List Update for Big Bend National Park and Rio Grande National Wild and Scenic River. U.S. Department of the Interior, National Park Service, Natural Resource Program Center, 2011.