एपीए उद्धरण

Westwater, F. L., & Waddell, W. A. (1968). An introduction to servomechanisms. English Universities press.

शिकागो स्टाइल उद्धरण

Westwater, F L., और W A. Waddell. An Introduction to Servomechanisms. London: English Universities press, 1968.

एमएलए उद्धरण

Westwater, F L., और W A. Waddell. An Introduction to Servomechanisms. English Universities press, 1968.