Davidson, J., & Vaughan, K. (2011). The ledge: An adventure story of friendship and survival on Mount Rainier. Ballantine Books.
Cita Chicago Style (17a ed.)Davidson, Jim, y Kevin Vaughan. The Ledge: An Adventure Story of Friendship and Survival on Mount Rainier. New York: Ballantine Books, 2011.
Cita MLA (8a ed.)Davidson, Jim, y Kevin Vaughan. The Ledge: An Adventure Story of Friendship and Survival on Mount Rainier. Ballantine Books, 2011.
Precaución: Estas citas no son 100% exactas.