Grigg, D. (1970). The Harsh lands: A study in agricultural development. Macmillan Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGrigg, David. The Harsh Lands: A Study in Agricultural Development. Macmillan Press, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGrigg, David. The Harsh Lands: A Study in Agricultural Development. Macmillan Press, 1970.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.