Carolyn F. Stephenson
George, Jean Craighead, Everglades Wildguide. Washington, D.C.: U.S. Department of the Interior. 1988.
Leopold, Aldo, A Sand County Almanac. New York: Ballantine Books. 1989.
Nash, Roderick, Wilderness And The American Mind. New Haven and London: Yale University Press, 1982.
National Park Service, The National Parks: Index 1989, Washington, D.C.: U.S. Department of the Interior, 1989.
National Park Service, The National Parks: Shaping the System. Washington, D.C.: U.S. Department of the Interior. 1985.
National Park Service, Salem: Maritime Salem in the Age of Sail, Washington, D.C.: U.S. Department of the Interior. 1987.
Reader’s Digest, Our National Parks: America’a Spectacular Wilderness Heritage, Pleasantville: The Reader’s Digest Association, Inc.. 1989 Updated Edition.
Tilden, Freeman, Interpreting Our Heritage, Chapel Hill: The University of North Carolina Press. 1957.
Tilden, Freeman, The State Parks: Their Meaning in American Life, New York: Albert A. Knopf, Inc. 1962.