Não informado. (1926). Farming in South Africa. Union of South Africa, Department of Agriculture.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Farming in South Africa. Pretoria, Africa do Sul: Union of South Africa, Department of Agriculture, 1926.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Farming in South Africa. Union of South Africa, Department of Agriculture, 1926.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.