APA

European Commission, . (2011). Grade retention during compulsory education in Europe. Brussels: Education, Audiovisiual and Culture Executive Agency.

Chicago

European Commission, . 2011. Grade retention during compulsory education in Europe. Brussels: Education, Audiovisiual and Culture Executive Agency.

Harvard

European Commission, . (2011). Grade retention during compulsory education in Europe. Brussels: Education, Audiovisiual and Culture Executive Agency.

MLA

European Commission, . Grade retention during compulsory education in Europe. Brussels: Education, Audiovisiual and Culture Executive Agency. 2011.