Escultura, E. E. (1991). Introduction to qualitative control theory / Edgar E. Escultura. Kalikasan Press.
Chicago-viite (17. p.)Escultura, Eddie E. Introduction to Qualitative Control Theory / Edgar E. Escultura. Manila: Kalikasan Press, 1991.
MLA-viite (9. p.)Escultura, Eddie E. Introduction to Qualitative Control Theory / Edgar E. Escultura. Kalikasan Press, 1991.
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