Mattessich, R. (1978). Instrumental reasoning and systems methodology. Theory and decision library 15.
Παραπομπή Chicago StyleMattessich, Richard. "Instrumental Reasoning and Systems Methodology." Theory and Decision Library 15 1978.
Παραπομπή MLAMattessich, Richard. "Instrumental Reasoning and Systems Methodology." Theory and Decision Library 15 1978.
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