Não informado. (1936). Agricultural Statistics. U.S. Department of Agriculture.
Lua i Stíl Chicago (17ú heag.)Não informado. Agricultural Statistics. Washington: U.S. Department of Agriculture, 1936.
Lua MLA (8ú heag.)Não informado. Agricultural Statistics. U.S. Department of Agriculture, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.