APA-referens (7:e uppl.)

Não informado. (1931). Cotton situation. U.S. Department of Agriculture, Bureau of Agricultural Economics.

Chicago-referens (17:e uppl.)

Não informado. Cotton Situation. Washington: U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.

MLA-referens (8:e uppl.)

Não informado. Cotton Situation. U.S. Department of Agriculture, Bureau of Agricultural Economics, 1931.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.