Widmeyer, G. R. (1989). DSS-89: Ninth International Conference on Decision Support Systems. The Institute of Management Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWidmeyer, George R. DSS-89: Ninth International Conference on Decision Support Systems. Providence: The Institute of Management Sciences, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWidmeyer, George R. DSS-89: Ninth International Conference on Decision Support Systems. The Institute of Management Sciences, 1989.
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