एपीए उद्धरण

Nagrath, I. J., & Gopal, M. (1975). Control systems engineering. Wiley Eastern.

शिकागो स्टाइल उद्धरण

Nagrath, I J., और M. Gopal. Control Systems Engineering. New Delhi: Wiley Eastern, 1975.

एमएलए उद्धरण

Nagrath, I J., और M. Gopal. Control Systems Engineering. Wiley Eastern, 1975.