Lewis, R., & Stewart, R. (1961). The managers: A new examination of the English, German and American executive. New American Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLewis, Roy, और Rosemary Stewart. The Managers: A New Examination of the English, German and American Executive. N. Y: New American Library, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLewis, Roy, और Rosemary Stewart. The Managers: A New Examination of the English, German and American Executive. New American Library, 1961.
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