Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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