Sirkin, G. (1968). The visible hand: The fundamentals of economic planning. McGraw-Hill Book Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSirkin, Gerald. The Visible Hand: The Fundamentals of Economic Planning. New York: McGraw-Hill Book Company, 1968.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSirkin, Gerald. The Visible Hand: The Fundamentals of Economic Planning. McGraw-Hill Book Company, 1968.
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