Athans, Pete. "Mount Everest." Telephone interview. 23 Feb. 2015.
Ashbrook, Tom, prod. "Sherpas and the Everest Avalanche." On Point. WBUR. Boston, Massachusetts, 24 Apr. 2014. Radio.
Brown, Chip. "Sorrow on the Mountain." National Geographic Nov. 2014: 1-21. Print.
Burgess, Alan. "Mount Everest." Telephone interview. 27 Jan. 2015.
"EVEREST HISTORY." EVEREST HISTORY. N.p., n.d. Web. 27 Jan. 2015. <http://www.everesthistory.com/>.
Feagon, Nancy. "Mount Everest." Personal interview. 17 Mar. 2015.
"Oxygen on Everest – Reviewing the Options – Updated." The Blog on Alanarnettecom. N.p., 19 Aug. 2013. Web. 30 Jan. 2015. <http://www.alanarnette.com/blog/2013/08/19/oxygen-on-everest-reviewing-the-options/>.
Sherpa, Apa. "Mount Everest." Personal interview. 15 Mar. 2015.
Ullman, James Ramsey. Kingdom of Adventure: Everest; a Chronicle of Man's Assault on the Earth's Highest Mountain. New York: W. Sloane Associates, 1947. Print.
Viesturs, Ed, and David Roberts. The Mountain: My Time on Everest. New York: Simon & Schuster, 2013. Print.
Ashbrook, Tom, prod. "Sherpas and the Everest Avalanche." On Point. WBUR. Boston, Massachusetts, 24 Apr. 2014. Radio.
Brown, Chip. "Sorrow on the Mountain." National Geographic Nov. 2014: 1-21. Print.
Burgess, Alan. "Mount Everest." Telephone interview. 27 Jan. 2015.
"EVEREST HISTORY." EVEREST HISTORY. N.p., n.d. Web. 27 Jan. 2015. <http://www.everesthistory.com/>.
Feagon, Nancy. "Mount Everest." Personal interview. 17 Mar. 2015.
"Oxygen on Everest – Reviewing the Options – Updated." The Blog on Alanarnettecom. N.p., 19 Aug. 2013. Web. 30 Jan. 2015. <http://www.alanarnette.com/blog/2013/08/19/oxygen-on-everest-reviewing-the-options/>.
Sherpa, Apa. "Mount Everest." Personal interview. 15 Mar. 2015.
Ullman, James Ramsey. Kingdom of Adventure: Everest; a Chronicle of Man's Assault on the Earth's Highest Mountain. New York: W. Sloane Associates, 1947. Print.
Viesturs, Ed, and David Roberts. The Mountain: My Time on Everest. New York: Simon & Schuster, 2013. Print.