Não informado. West Virginia Agriculture and Forestry. University of West Virginia, College of Agriculture and Forestry.
Lua i Stíl Chicago (17ú heag.)Não informado. West Virginia Agriculture and Forestry. Morgantown, Wa. Va: University of West Virginia, College of Agriculture and Forestry.
Lua MLA (8ú heag.)Não informado. West Virginia Agriculture and Forestry. University of West Virginia, College of Agriculture and Forestry.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.