Cita APA (7th ed.)

Keesing, D. B. (1979). Trade policy for developing countries. World Bank.

Cita Chicago (17th ed.)

Keesing, Donald B. Trade Policy for Developing Countries. Washington: World Bank, 1979.

Cita MLA (9th ed.)

Keesing, Donald B. Trade Policy for Developing Countries. World Bank, 1979.