Não informado. (1926). Yearbook of agriculture. U.S. Department of Agriculture.
Lua i Stíl Chicago (17ú heag.)Não informado. Yearbook of Agriculture. Washington: U.S. Department of Agriculture, 1926.
Lua MLA (8ú heag.)Não informado. Yearbook of Agriculture. U.S. Department of Agriculture, 1926.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.