APA (7th ed.) Citation

Geological Survey (U.S.). (1975). John Wesley Powell, soldier, explorer, scientist. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). John Wesley Powell, Soldier, Explorer, Scientist. Washington, D.C.: U.S. Dept. of the Interior, Geological Survey, 1975.

MLA (9th ed.) Citation

Geological Survey (U.S.). John Wesley Powell, Soldier, Explorer, Scientist. U.S. Dept. of the Interior, Geological Survey, 1975.