Kogan, I. S., & Heltzer, H. . M. t. i. m. b. (1977). Business organization. Alexander Hamilton Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKogan, Irving Smith, और Harry. Management techniques in modern business Heltzer. Business Organization. New York: Alexander Hamilton Institute, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKogan, Irving Smith, और Harry. Management techniques in modern business Heltzer. Business Organization. Alexander Hamilton Institute, 1977.
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