Lieten, K. (2005). Child labour: Burning questions : inaugural lecture delivered as the Professor in Child Labour Studies, in particular the historical and social aspects, on behalf of the International Institute of Social History at the University of Amsterdam, on Friday 21 November, 2003. Amsterdam: Aksant.

Lieten, Kristoffel. Child Labour: Burning Questions : Inaugural Lecture Delivered As the Professor in Child Labour Studies, in Particular the Historical and Social Aspects, On Behalf of the International Institute of Social History At the University of Amsterdam, On Friday 21 November, 2003. Amsterdam: Aksant, 2005.

Lieten, Kristoffel. Child Labour: Burning Questions : Inaugural Lecture Delivered As the Professor in Child Labour Studies, in Particular the Historical and Social Aspects, On Behalf of the International Institute of Social History At the University of Amsterdam, On Friday 21 November, 2003. Amsterdam: Aksant, 2005.