Cita APA (7th ed.)

Huntington, E., Williams, F. E., Van Valkenburg, S., & Visher, S. S. (1940). Principles of economic geography. J. Wiley & sons.

Cita Chicago (17th ed.)

Huntington, Ellsworth, Frank Ernest Williams, Samuel Van Valkenburg, i Stephen Sargent Visher. Principles of Economic Geography. New York: J. Wiley & sons, 1940.

Cita MLA (9th ed.)

Huntington, Ellsworth, et al. Principles of Economic Geography. J. Wiley & sons, 1940.