Viesturs, E., & Roberts, D. (2011). The will to climb: Obsession and commitment and the quest to climb Annapurna--the world's most deadly peak. Crown Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रViesturs, Ed, और David Roberts. The Will to Climb: Obsession and Commitment and the Quest to Climb Annapurna--the World's Most Deadly Peak. New York: Crown Publishers, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रViesturs, Ed, और David Roberts. The Will to Climb: Obsession and Commitment and the Quest to Climb Annapurna--the World's Most Deadly Peak. Crown Publishers, 2011.
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