European Foundation for the improvement of living and working conditions., Riedmann, A., Bielenski, H., Szczurowska, T., & Wagner, A. (2006). Working time and work-life balance in European companies: Establishment survey on working time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων.

European Foundation for the improvement of living and working conditions., Arnold Riedmann, Harald Bielenski, Teresa Szczurowska, and Alexandra Wagner. Working Time and Work-life Balance in European Companies: Establishment Survey On Working Time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2006.

European Foundation for the improvement of living and working conditions., et al. Working Time and Work-life Balance in European Companies: Establishment Survey On Working Time 2004-2005. Λουξεμβούργο: Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2006.