ACKOFF RUSSELL L. (1962). SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS (5TH.). JOHN WILEY AND SONS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रACKOFF RUSSELL L. SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS. 5TH. NEW YORK: JOHN WILEY AND SONS, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्रACKOFF RUSSELL L. SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS. 5TH. JOHN WILEY AND SONS, 1962.
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