(1989). Geomorphology, vegetation, and Patowmack canal construction problems: Great Falls Park, Potomac River, Virginia: Potomac River Gorge, Virginia, July 13, 1989. American Geophysical Union.
Chicago-Zitierstil (17. Ausg.)Geomorphology, Vegetation, and Patowmack Canal Construction Problems: Great Falls Park, Potomac River, Virginia: Potomac River Gorge, Virginia, July 13, 1989. Washington, DC: American Geophysical Union, 1989.
MLA-Zitierstil (9. Ausg.)Geomorphology, Vegetation, and Patowmack Canal Construction Problems: Great Falls Park, Potomac River, Virginia: Potomac River Gorge, Virginia, July 13, 1989. American Geophysical Union, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.