Não informado. (2004). Ers. U.S. Department of Agriculture, Economic Research Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Ers. Washington: U.S. Department of Agriculture, Economic Research Service, 2004.
Lua MLA (8ú heag.)Não informado. Ers. U.S. Department of Agriculture, Economic Research Service, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.