Bossing, N. L. Progressive methods of teaching in secondary schools: In two volumes. United States Armed Forces Inst.
Chicago-Zitierstil (17. Ausg.)Bossing, Nelson L. Progressive Methods of Teaching in Secondary Schools: In Two Volumes. Madison, Wis: United States Armed Forces Inst.
MLA-Zitierstil (9. Ausg.)Bossing, Nelson L. Progressive Methods of Teaching in Secondary Schools: In Two Volumes. United States Armed Forces Inst.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.