European Commission. Directorate-General XXII, E., Statistical Office of the European Communities., & European Centre for the Development of Vocational Training. (1997). Key data on vocational training in the European Union. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. Directorate-General XXII, Education, Statistical Office of the European Communities, and European Centre for the Development of Vocational Training. Key Data On Vocational Training in the European Union. Luxembourg: Office for Official Publications of the European Communities, 1997.
Παραπομπή MLAEuropean Commission. Directorate-General XXII, Education, Statistical Office of the European Communities, and European Centre for the Development of Vocational Training. Key Data On Vocational Training in the European Union. Luxembourg: Office for Official Publications of the European Communities, 1997.