Não informado. (1951). Core Arboretum Bulletin. West Virginia University, Department of Biology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Core Arboretum Bulletin. Morgantown, Va: West Virginia University, Department of Biology, 1951.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Core Arboretum Bulletin. West Virginia University, Department of Biology, 1951.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.