APA (7e ed.) Bronvermelding

Não informado. (1971). Educational documentation and information. International Bureau of Education.

Chicago (17e ed.) Bronvermelding

Não informado. Educational Documentation and Information. Geneve, Suíça: International Bureau of Education, 1971.

MLA (8e ed.) Bronvermelding

Não informado. Educational Documentation and Information. International Bureau of Education, 1971.

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