(1989). Yellowstone and Grand Teton National Parks and the Middle Rocky Mountains: Casper, Wyoming to Salt Lake City, Utah, July 20 - 30, 1989. American Geophysical Union.
Chicago-Zitierstil (17. Ausg.)Yellowstone and Grand Teton National Parks and the Middle Rocky Mountains: Casper, Wyoming to Salt Lake City, Utah, July 20 - 30, 1989. Washington, DC: American Geophysical Union, 1989.
MLA-Zitierstil (9. Ausg.)Yellowstone and Grand Teton National Parks and the Middle Rocky Mountains: Casper, Wyoming to Salt Lake City, Utah, July 20 - 30, 1989. American Geophysical Union, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.