KELLEY, E. J. (1976). Marketing Planning And Competitive Strategy Eugene J. Kelley. Prentice- hall of India.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKELLEY, Eugene J. Marketing Planning And Competitive Strategy Eugene J. Kelley. Prentice- hall of India, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKELLEY, Eugene J. Marketing Planning And Competitive Strategy Eugene J. Kelley. Prentice- hall of India, 1976.
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