All images from copyright free Google images unless stated here.
Map: Mount Everest Climbing Route. ProQuest, Ann Arbor, 2008. sirsdiscoverer, https://explore.proquest.com/sirsdiscoverer/document/2256249775?accountid=6738.
Smith, Roland. Peak. "Map". Scholastic, 2007.
Anastasia, Laura. “Ready for Everest? (Cover Story).” Scholastic News -- Edition 4, vol. 78, no. 16, Feb. 2016, p. 4. EBSCOhost, search.ebscohost.com/login.aspx?direct=true&db=sch&AN=113242672&site=scirc-live.