APA (7 वां संस्करण) प्रशस्ति पत्र
Gopal, M. (2003). Digital control and state variable methods: Conventional and neural fuzzy control systems (2nd ed.). Tata McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Gopal, M. Digital Control and State Variable Methods: Conventional and Neural Fuzzy Control Systems. 2nd ed. New Delhi: Tata McGraw-Hill, 2003.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Gopal, M. Digital Control and State Variable Methods: Conventional and Neural Fuzzy Control Systems. 2nd ed. Tata McGraw-Hill, 2003.
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