Cita APA (7th ed.)

De Vries, B. A. (1979). Export promotion policies. World Bank.

Cita Chicago (17th ed.)

De Vries, Barend A. Export Promotion Policies. Washington, D.C: World Bank, 1979.

Cita MLA (9th ed.)

De Vries, Barend A. Export Promotion Policies. World Bank, 1979.