Não informado. (1975). Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Agricultural Outlook. Washington: U.S. Department of Agriculture, Economic Research Service, 1975.
Lua MLA (8ú heag.)Não informado. Agricultural Outlook. U.S. Department of Agriculture, Economic Research Service, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.