Ellis, D. O., & Ludwig, F. J. (1962). Systems philosophy: [the major concepts involved in the engineering and management of man-made systems and man / machine systems]. Prentice-Hall.
Chicago-Zitierstil (17. Ausg.)Ellis, David Owen, und Fred J. Ludwig. Systems Philosophy: [the Major Concepts Involved in the Engineering and Management of Man-made Systems and Man / Machine Systems]. Englewood Cliffs, N.J: Prentice-Hall, 1962.
MLA-Zitierstil (9. Ausg.)Ellis, David Owen, und Fred J. Ludwig. Systems Philosophy: [the Major Concepts Involved in the Engineering and Management of Man-made Systems and Man / Machine Systems]. Prentice-Hall, 1962.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.