APA (7e ed.) Bronvermelding

Não informado. (1927). Bulletin du Bureau International d' Education. Bureau International d' Education.

Chicago (17e ed.) Bronvermelding

Não informado. Bulletin Du Bureau International D' Education. Geneve, Suíça: Bureau International d' Education, 1927.

MLA (8e ed.) Bronvermelding

Não informado. Bulletin Du Bureau International D' Education. Bureau International d' Education, 1927.

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