Παραπομπή APA

Director, S. W., & Rohrer, R. A. Introduction to Systems Theory. McGraw-Hill Kogakusha Ltd.

Παραπομπή Chicago Style

Director, Stephen W., και Ronald A. Rohrer. Introduction to Systems Theory. Tokyo: McGraw-Hill Kogakusha Ltd.

Παραπομπή MLA

Director, Stephen W., και Ronald A. Rohrer. Introduction to Systems Theory. McGraw-Hill Kogakusha Ltd.