.Landsberg, H. H. (1964). Natural resources for U.S. growth: A look ahead to the year 2000. Published for Resources for the Future by Johns Hopkins Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र.Landsberg, Hans H. Natural Resources for U.S. Growth: A Look Ahead to the Year 2000. Baltimore: Published for Resources for the Future by Johns Hopkins Press, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्र.Landsberg, Hans H. Natural Resources for U.S. Growth: A Look Ahead to the Year 2000. Published for Resources for the Future by Johns Hopkins Press, 1964.
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