APA (7th ed.) Citation

Yellowstone National Park (Agency : U.S.). (2012). Bicycling in Yellowstone Park (Revised June 2012.). National Park Service, Yellowstone National Park.

Chicago Style (17th ed.) Citation

Yellowstone National Park (Agency : U.S.). Bicycling in Yellowstone Park. Revised June 2012. Yellowstone, WY: National Park Service, Yellowstone National Park, 2012.

MLA (9th ed.) Citation

Yellowstone National Park (Agency : U.S.). Bicycling in Yellowstone Park. Revised June 2012. National Park Service, Yellowstone National Park, 2012.