Marvin, P. (1972). Product planning simplified. American Management Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarvin, Philip. Product Planning Simplified. [New York]: American Management Association, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarvin, Philip. Product Planning Simplified. American Management Association, 1972.
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