Handscombe, R. S. (1989). The product management handbook: Your practical guide to improving and sustaining results. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHandscombe, Richard S. The Product Management Handbook: Your Practical Guide to Improving and Sustaining Results. London: McGraw-Hill, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHandscombe, Richard S. The Product Management Handbook: Your Practical Guide to Improving and Sustaining Results. McGraw-Hill, 1989.
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