Não informado. Spectator. National Association of Elementary School Principals.
Chicago-Zitierstil (17. Ausg.)Não informado. Spectator. Arlington, Va: National Association of Elementary School Principals.
MLA-Zitierstil (8. Ausg.)Não informado. Spectator. National Association of Elementary School Principals.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.