APA (7e ed.) Bronvermelding

Economic research service, USDA, Gibson, P., Wainio, J., Whitley, D., & Bohman, M. (2001). Profiles of tariffs in global agricultural markets: Agricultural economic report No 796.

Chicago (17e ed.) Bronvermelding

Economic research service, USDA, Paul Gibson, John Wainio, Daniel Whitley, en M. Bohman. Profiles of Tariffs in Global Agricultural Markets: Agricultural Economic Report No 796. 2001.

MLA (9e ed.) Bronvermelding

Economic research service, et al. Profiles of Tariffs in Global Agricultural Markets: Agricultural Economic Report No 796. 2001.