Cita APA (7th ed.)

Stamp, L. D. (1939). A commercial geography (3ª ed.). Longmans.

Cita Chicago (17th ed.)

Stamp, L. Dudley. A Commercial Geography. 3ª ed. London: Longmans, 1939.

Cita MLA (9th ed.)

Stamp, L. Dudley. A Commercial Geography. 3ª ed. Longmans, 1939.