APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

Valdes, Alberto, et al. Surveillance of Agricultural Price and Trade Policies: A Handbook for Ecuador. World Bank, 1996.