Παραπομπή σε μορφή APA (7η εκδ.)

European Commission. (2003). The budgetary challenges posed by ageing polulations. Office of the Official Publications of the European Communities.

Παραπομπή σε μορφή Chicago (17η εκδ.)

European Commission. The Budgetary Challenges Posed by Ageing Polulations. Luxemburg: Office of the Official Publications of the European Communities, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

European Commission. The Budgetary Challenges Posed by Ageing Polulations. Office of the Official Publications of the European Communities, 2003.