Carkhuff, R. R. (2000). Human possibilities: Human capital in the 21st century. Possibilities Pub.
Chicago-Zitierstil (17. Ausg.)Carkhuff, Robert R. Human Possibilities: Human Capital in the 21st Century. Amherst, Mass: Possibilities Pub, 2000.
MLA-Zitierstil (9. Ausg.)Carkhuff, Robert R. Human Possibilities: Human Capital in the 21st Century. Possibilities Pub, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.