Cita APA (7a ed.)

Fairgrieve, J., & Young, E. (1927). The gateways of commerce (5th ed.). George Philip and Son.

Cita Chicago Style (17a ed.)

Fairgrieve, J., y E. Young. The Gateways of Commerce. 5th ed. London [etc.]: George Philip and Son, 1927.

Cita MLA (9a ed.)

Fairgrieve, J., y E. Young. The Gateways of Commerce. 5th ed. George Philip and Son, 1927.