Schullery, P. (2001). America's national parks: The spectacular forces that shaped our treasured land (1st American ed.). DK.
Style de citation Chicago (17e éd.)Schullery, Paul. America's National Parks: The Spectacular Forces That Shaped Our Treasured Land. 1st American ed. London : New York: DK, 2001.
Style de citation MLA (8e éd.)Schullery, Paul. America's National Parks: The Spectacular Forces That Shaped Our Treasured Land. 1st American ed. DK, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.