Cita APA (7a ed.)

Cowling, T. M., & Steeley, G. C. (1973). Sub-regional planning studies: An evaluation. Pergamon Press.

Cita Chicago Style (17a ed.)

Cowling, T. M., y G. C. Steeley. Sub-regional Planning Studies: An Evaluation. Oxford: Pergamon Press, 1973.

Cita MLA (9a ed.)

Cowling, T. M., y G. C. Steeley. Sub-regional Planning Studies: An Evaluation. Pergamon Press, 1973.