National Association of Elementary School Principals (U.S.). (1980). Principal. National Association of Elementary School Principals.
Chicago-Zitierstil (17. Ausg.)National Association of Elementary School Principals (U.S.). Principal. Arlington, Va.: National Association of Elementary School Principals, 1980.
MLA-Zitierstil (9. Ausg.)National Association of Elementary School Principals (U.S.). Principal. National Association of Elementary School Principals, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.