MOTTEL, W. J. (1995). Industrial Safety Is Good Business The Du Pont Story William J. Mottel, Joseph F.long, David E. Morrison. Van Nostrand.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMOTTEL, William J. Industrial Safety Is Good Business The Du Pont Story William J. Mottel, Joseph F.long, David E. Morrison. Van Nostrand, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMOTTEL, William J. Industrial Safety Is Good Business The Du Pont Story William J. Mottel, Joseph F.long, David E. Morrison. Van Nostrand, 1995.
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