APA (7e ed.) Bronvermelding

Valdes, A., & Schaeffer, B. (1996). Surveillance of agricultural price and trade policies: A handbook for Paraguay. World Bank.

Chicago (17e ed.) Bronvermelding

Valdes, Alberto, en Barry Schaeffer. Surveillance of Agricultural Price and Trade Policies: A Handbook for Paraguay. Washington, D.C: World Bank, 1996.

MLA (9e ed.) Bronvermelding

Valdes, Alberto, en Barry Schaeffer. Surveillance of Agricultural Price and Trade Policies: A Handbook for Paraguay. World Bank, 1996.