Backes, D. (1997). Wilderness Within: The Life of Sigurd F. Olson. University of Minnesota Press.
Style de citation Chicago (17e éd.)Backes, David. Wilderness Within: The Life of Sigurd F. Olson. Minneapolis: University of Minnesota Press, 1997.
Style de citation MLA (8e éd.)Backes, David. Wilderness Within: The Life of Sigurd F. Olson. University of Minnesota Press, 1997.
Attention : ces citations peuvent ne pas être correctes à 100%.