Berg, S. V. (1989). Natural monopoly regulation principles and practice. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBerg, Sanford V. Natural Monopoly Regulation Principles and Practice. Cambridge University Press, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBerg, Sanford V. Natural Monopoly Regulation Principles and Practice. Cambridge University Press, 1989.
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