Parkinson, S. T. (1984). New product development in engineering: A comparison of the British and West German machine tool industries. Cambridge U.P.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रParkinson, Stephen T. New Product Development in Engineering: A Comparison of the British and West German Machine Tool Industries. Cambridge U.P, 1984.
एमएलए (9वां संस्करण) प्रशस्ति पत्रParkinson, Stephen T. New Product Development in Engineering: A Comparison of the British and West German Machine Tool Industries. Cambridge U.P, 1984.
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