James, P. E., Whipple, G., & Weiss, M. (1971). Man on the earth: An introduction to geography. Macmillan.
Cita Chicago Style (17a ed.)James, Preston E., Gertrude Whipple, y Morris Weiss. Man on the Earth: An Introduction to Geography. New York: Macmillan, 1971.
Cita MLA (9a ed.)James, Preston E., et al. Man on the Earth: An Introduction to Geography. Macmillan, 1971.
Precaución: Estas citas no son 100% exactas.