Morrison, C. M. (1976). Ability grouping and mixed-ability grouping in secondary schools. Scottish Council for Research in Education.
Chicago-Zitierstil (17. Ausg.)Morrison, Charles M. Ability Grouping and Mixed-ability Grouping in Secondary Schools. Edinburgh: Scottish Council for Research in Education, 1976.
MLA-Zitierstil (9. Ausg.)Morrison, Charles M. Ability Grouping and Mixed-ability Grouping in Secondary Schools. Scottish Council for Research in Education, 1976.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.