Παραπομπή APA

Westwater , F. L. . .., & Weddell, W. A. . .. (1961). Introduction to servo mechanisms (1.). English Universities Press.

Παραπομπή Chicago Style

Westwater , F L ., και W A. Weddell. Introduction to Servo Mechanisms. 1. London: English Universities Press, 1961.

Παραπομπή MLA

Westwater , F L ., και W A. Weddell. Introduction to Servo Mechanisms. 1. English Universities Press, 1961.