Sage, A. P. (1977). Optimum systems control (2nd ed.). Prentice-Hall of India.
Čikaški stil citiranjaSage, Andrew P. Optimum Systems Control. 2nd ed. New Jersey: Prentice-Hall of India, 1977.
MLA način citiranjaSage, Andrew P. Optimum Systems Control. 2nd ed. Prentice-Hall of India, 1977.
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