APA-referens (7:e uppl.)

United States. Department of Agriculture. Economic Research Service. (1994). Agricultural resources and environmental indicators. The Service.

Chicago-referens (17:e uppl.)

United States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. Washington, DC: The Service, 1994.

MLA-referens (9:e uppl.)

United States. Department of Agriculture. Economic Research Service. Agricultural Resources and Environmental Indicators. The Service, 1994.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.