Bossing, N. L. (1942). Progressive methods of teaching in secondary schools (Rev. ed.). Houghton Mifflin Company.
Chicago-Zitierstil (17. Ausg.)Bossing, Nelson L. Progressive Methods of Teaching in Secondary Schools. Rev. ed. Boston, New York [etc.]: Houghton Mifflin Company, 1942.
MLA-Zitierstil (8. Ausg.)Bossing, Nelson L. Progressive Methods of Teaching in Secondary Schools. Rev. ed. Houghton Mifflin Company, 1942.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.