APA (7e ed.) Bronvermelding

International Bureau of Education. (1979). Directory of educational documentation and information services =: Repertoire des services de documentation et d'information pedagogiques (3d ed.). Unesco.

Chicago (17e ed.) Bronvermelding

International Bureau of Education. Directory of Educational Documentation and Information Services =: Repertoire Des Services De Documentation Et D'information Pedagogiques. 3d ed. Paris: Unesco, 1979.

MLA (8e ed.) Bronvermelding

International Bureau of Education. Directory of Educational Documentation and Information Services =: Repertoire Des Services De Documentation Et D'information Pedagogiques. 3d ed. Unesco, 1979.