Παραπομπή APA

Ludyk, G. (1981). Time-variant discrete-time systems. Vieweg.

Παραπομπή Chicago Style

Ludyk, Gunter. Time-variant Discrete-time Systems. Braunschweig: Vieweg, 1981.

Παραπομπή MLA

Ludyk, Gunter. Time-variant Discrete-time Systems. Vieweg, 1981.