Sobel, R. (1972). The age of giant corporations: A microeconomic history of American business, 1914-1970. Greenwood Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSobel, Robert. The Age of Giant Corporations: A Microeconomic History of American Business, 1914-1970. Westport, Conn.: Greenwood Press, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSobel, Robert. The Age of Giant Corporations: A Microeconomic History of American Business, 1914-1970. Greenwood Press, 1972.
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