APA (7e ed.) Bronvermelding

Não informado. (1980). Principal. National Association of Elementary School Principals.

Chicago (17e ed.) Bronvermelding

Não informado. Principal. Arlington, Va: National Association of Elementary School Principals, 1980.

MLA (8e ed.) Bronvermelding

Não informado. Principal. National Association of Elementary School Principals, 1980.

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