ACKOFF RUSSELL L. (1962). SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS (5TH.). JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)ACKOFF RUSSELL L. SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS. 5TH. NEW YORK: JOHN WILEY AND SONS, 1962.
Lua MLA (9ú heag.)ACKOFF RUSSELL L. SCIENTIFIC METHOD OPTIMIZING APPLIED RESEARCH DECISIONS. 5TH. JOHN WILEY AND SONS, 1962.
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