UNESCO Institute for Education, Pergamon Press, & Cropley, A. J. (1980). Towards a system of lifelong education: Some practical considerations. Unesco Institute For Education ; Pergamon Press.
Chicago-Zitierstil (17. Ausg.)UNESCO Institute for Education, Pergamon Press, und Arthur John Cropley. Towards a System of Lifelong Education: Some Practical Considerations. Hamburg : Oxford [i pozostałe]: Unesco Institute For Education ; Pergamon Press, 1980.
MLA-Zitierstil (9. Ausg.)UNESCO Institute for Education, et al. Towards a System of Lifelong Education: Some Practical Considerations. Unesco Institute For Education ; Pergamon Press, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.