Bossing, N. L. (1944). Progressive methods of teaching in secondary school. Houghton Mifflin.
Citazione stile Chigago Style (17a edizione)Bossing, Nelson L. Progressive Methods of Teaching in Secondary School. Houghton Mifflin, 1944.
Citatione MLA (9a ed.)Bossing, Nelson L. Progressive Methods of Teaching in Secondary School. Houghton Mifflin, 1944.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.