APA (7e ed.) Bronvermelding

Não informado. (1972). Education. National School Public Relations Association.

Chicago (17e ed.) Bronvermelding

Não informado. Education. Washington: National School Public Relations Association, 1972.

MLA (8e ed.) Bronvermelding

Não informado. Education. National School Public Relations Association, 1972.

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