Descy, P., & Tessaring, M. (2005). The value of learning: Evaluation and impact of education and training. Office for Official Publications of the European Communities.
Παραπομπή σε μορφή Chicago (17η εκδ.)Descy, Pascaline, και Manfred Tessaring. The Value of Learning: Evaluation and Impact of Education and Training. Luxembourg: Office for Official Publications of the European Communities, 2005.
Παραπομπή σε μορφή MLA (8th εκδ.)Descy, Pascaline, και Manfred Tessaring. The Value of Learning: Evaluation and Impact of Education and Training. Office for Official Publications of the European Communities, 2005.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.