BULTIN, J. A. The economics of enviromental and natural resaurces Policy#Editor John A. Butlin. Westview Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBULTIN, John A. The Economics of Enviromental and Natural Resaurces Policy#Editor John A. Butlin. Westview Press.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBULTIN, John A. The Economics of Enviromental and Natural Resaurces Policy#Editor John A. Butlin. Westview Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.