Chung, H., Kerkhofs, M., Ester, P., & European Foundation for the improvement of living and working conditions. (2007). Working time flexibility in European companies: Establishment survey on working time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων.
Παραπομπή Chicago StyleChung, Heejung., Marcel Kerkhofs, Peter Ester, and European Foundation for the improvement of living and working conditions. Working Time Flexibility in European Companies: Establishment Survey On Working Time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2007.
Παραπομπή MLAChung, Heejung., Marcel Kerkhofs, Peter Ester, and European Foundation for the improvement of living and working conditions. Working Time Flexibility in European Companies: Establishment Survey On Working Time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2007.