APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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