Hill, D. (1946). Co-operative research in industry. Hutchinsons Scientific and Technical Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHill, D.W. Co-operative Research in Industry. London: Hutchinsons Scientific and Technical Publications, 1946.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHill, D.W. Co-operative Research in Industry. Hutchinsons Scientific and Technical Publications, 1946.
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