Παραπομπή APA

Sage, A. P. (1977). Optimum systems control (2nd ed.). Prentice-Hall of India.

Παραπομπή Chicago Style

Sage, Andrew P. Optimum Systems Control. 2nd ed. New Jersey: Prentice-Hall of India, 1977.

Παραπομπή MLA

Sage, Andrew P. Optimum Systems Control. 2nd ed. Prentice-Hall of India, 1977.