Não informado. Thrust for educational leadership. Association of California School Administrators.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Thrust for Educational Leadership. Burlingame, Calif: Association of California School Administrators.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Thrust for Educational Leadership. Association of California School Administrators.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.