Dyfyniad APA

Director, S. W., & Rohrer, R. A. (1972). Introduction to systems theory. Mc Graw - Hill.

Dyfyniad Arddull Chicago

Director, Stephen W., and Ronald A. Rohrer. Introduction to Systems Theory. New Delhi: Mc Graw - Hill, 1972.

Dyfyniad MLA

Director, Stephen W., and Ronald A. Rohrer. Introduction to Systems Theory. Mc Graw - Hill, 1972.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.