Cita APA (7th ed.)

Stamp, L. (1973). An Intermediate commercial geography P-I Commodities & world trade (5th.). Longman Group ltd.

Cita Chicago (17th ed.)

Stamp, L. An Intermediate Commercial Geography P-I Commodities & World Trade. 5th. London: Longman Group ltd, 1973.

Cita MLA (9th ed.)

Stamp, L. An Intermediate Commercial Geography P-I Commodities & World Trade. 5th. Longman Group ltd, 1973.