Cita APA (7th ed.)
Backes, D. (1997). A wilderness within: The life of Sigurd F. Olson. University of Minnesota Press.
Cita Chicago (17th ed.)
Backes, David. A Wilderness Within: The Life of Sigurd F. Olson. Minneapolis: University of Minnesota Press, 1997.
Cita MLA (9th ed.)
Backes, David. A Wilderness Within: The Life of Sigurd F. Olson. University of Minnesota Press, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.