APA (7th ed.) Citation

Unsworth, W. (1981). Everest, a mountaineering history. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Unsworth, Walt. Everest, a Mountaineering History. Boston, Mass.: Houghton Mifflin, 1981.

MLA (9th ed.) Citation

Unsworth, Walt. Everest, a Mountaineering History. Houghton Mifflin, 1981.

Warning: These citations may not always be 100% accurate.