UNESCO. (1982). Directory of educational documentation and information services =: Répertoire des services de documentation et information sur l'éducation = Repertorio de servicios de documentación e información educacionales (Fourth edition.). United Nations Educational, Scientific and Cultural Organization.
Chicago-Zitierstil (17. Ausg.)UNESCO. Directory of Educational Documentation and Information Services =: Répertoire Des Services De Documentation Et Information Sur L'éducation = Repertorio De Servicios De Documentación E Información Educacionales. Fourth edition. Paris: United Nations Educational, Scientific and Cultural Organization, 1982.
MLA-Zitierstil (9. Ausg.)UNESCO. Directory of Educational Documentation and Information Services =: Répertoire Des Services De Documentation Et Information Sur L'éducation = Repertorio De Servicios De Documentación E Información Educacionales. Fourth edition. United Nations Educational, Scientific and Cultural Organization, 1982.