National Association of Secondary School Principals. Task Force on Secondary Schools in a Changing Society. (1975). This we believe: A statement on secondary education. NASSP.
Citazione stile Chigago Style (17a edizione)National Association of Secondary School Principals. Task Force on Secondary Schools in a Changing Society. This We Believe: A Statement on Secondary Education. Reston, Va.: NASSP, 1975.
Citatione MLA (8a ed.)National Association of Secondary School Principals. Task Force on Secondary Schools in a Changing Society. This We Believe: A Statement on Secondary Education. NASSP, 1975.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.