Cita APA (7a ed.)

Gannett, H., Garrison, C. L., & Houston, E. J. (1905). Commercial geography. American Book.

Cita Chicago Style (17a ed.)

Gannett, Henry, Carl Louise Garrison, y Edwin James Houston. Commercial Geography. New York [etc.]: American Book, 1905.

Cita MLA (9a ed.)

Gannett, Henry, et al. Commercial Geography. American Book, 1905.