APA (7e ed.) Bronvermelding

Não informado. (1963). Education abstracts. American College Public Relations Association.

Chicago (17e ed.) Bronvermelding

Não informado. Education Abstracts. Washington: American College Public Relations Association, 1963.

MLA (8e ed.) Bronvermelding

Não informado. Education Abstracts. American College Public Relations Association, 1963.

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