APA (7e ed.) Bronvermelding

Não informado. (2002). Principal Leadership. National Association of Secondary School Principals.

Chicago (17e ed.) Bronvermelding

Não informado. Principal Leadership. Reston, Va: National Association of Secondary School Principals, 2002.

MLA (8e ed.) Bronvermelding

Não informado. Principal Leadership. National Association of Secondary School Principals, 2002.

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