Greenberg, D. (1973). "Announcing a new school.": A personal account of the beginnings of the Sudbury Valley School. Sudbury Valley School Press.
Chicago-Zitierstil (17. Ausg.)Greenberg, Daniel. "Announcing a New School.": A Personal Account of the Beginnings of the Sudbury Valley School. Framingham, Mass.: Sudbury Valley School Press, 1973.
MLA-Zitierstil (8. Ausg.)Greenberg, Daniel. "Announcing a New School.": A Personal Account of the Beginnings of the Sudbury Valley School. Sudbury Valley School Press, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.