Cita APA (7a ed.)

Knowles, R. (1981). Economic and Social Geography (Fourth Edition). ELSEVIER.

Cita Chicago Style (17a ed.)

Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.

Cita MLA (8a ed.)

Knowles, R. Economic and Social Geography (Fourth Edition). ELSEVIER, 1981.

Precaución: Estas citas no son 100% exactas.