Cita APA (7th ed.)
Gopal, M. (1993). Digital control engineering (2nd ed.). New Age International.
Cita Chicago (17th ed.)
Gopal, M. Digital Control Engineering. 2nd ed. Kolkata: New Age International, 1993.
Cita MLA (9th ed.)
Gopal, M. Digital Control Engineering. 2nd ed. New Age International, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.