Não informado. (2003). Southern African Forestry Journal. Southern African Institute of Forestry.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Southern African Forestry Journal. Pretoria, Africa do Sul: Southern African Institute of Forestry, 2003.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Southern African Forestry Journal. Southern African Institute of Forestry, 2003.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.