APA (7e ed.) Bronvermelding

National Association of Elementary School Principals (U.S.). (1980). Principal. National Association of Elementary School Principals.

Chicago (17e ed.) Bronvermelding

National Association of Elementary School Principals (U.S.). Principal. Arlington, Va.: National Association of Elementary School Principals, 1980.

MLA (9e ed.) Bronvermelding

National Association of Elementary School Principals (U.S.). Principal. National Association of Elementary School Principals, 1980.

Let op: Deze citaties zijn niet altijd 100% accuraat.