APA (7th ed.) Citation

Hoffman, M. D., & Wanger, R. (1935). Leadership in a changing world. Harper.

Chicago Style (17th ed.) Citation

Hoffman, M. David, and Ruth Wanger. Leadership in a Changing World. New York: Harper, 1935.

MLA (9th ed.) Citation

Hoffman, M. David, and Ruth Wanger. Leadership in a Changing World. Harper, 1935.