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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Viesturs, Ed, و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Viesturs, Ed, و David Roberts. The Will to Climb: Obsession and Commitment and the Quest to Climb Annapurna--the World's Most Deadly Peak. Crown Publishers, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.