Não informado. (1970). American secondary education. Ohio Association of Secondary School Administrators.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Secondary Education. Akron, Ohio: Ohio Association of Secondary School Administrators, 1970.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Secondary Education. Ohio Association of Secondary School Administrators, 1970.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.