Cita APA (7a ed.)

Speak, P., & Carter, A. (1968). Physical geography (1st edition.). Longmans.

Cita Chicago Style (17a ed.)

Speak, P., y A.H.C Carter. Physical Geography. 1st edition. [Lugar de publicación no identificado]: Longmans, 1968.

Cita MLA (8a ed.)

Speak, P., y A.H.C Carter. Physical Geography. 1st edition. Longmans, 1968.