Não informado. (1951). Core Arboretum Bulletin. West Virginia University, Department of Biology.
Lua i Stíl Chicago (17ú heag.)Não informado. Core Arboretum Bulletin. Morgantown, Va: West Virginia University, Department of Biology, 1951.
Lua MLA (8ú heag.)Não informado. Core Arboretum Bulletin. West Virginia University, Department of Biology, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.