Petersen, A. W., Wehmeyer, C., & European Centre for the Development of Vocational Training. (2004). ICT practitioner skills and training solutions at sub-degree and vocational level in Europe: Guidelines for ICT training and curriculum development. Luxembourg: Office for Official Publications of the European Communities.

Petersen, A. Willi., Carsten Wehmeyer, and European Centre for the Development of Vocational Training. ICT Practitioner Skills and Training Solutions At Sub-degree and Vocational Level in Europe: Guidelines for ICT Training and Curriculum Development. Luxembourg: Office for Official Publications of the European Communities, 2004.

Petersen, A. Willi., Carsten Wehmeyer, and European Centre for the Development of Vocational Training. ICT Practitioner Skills and Training Solutions At Sub-degree and Vocational Level in Europe: Guidelines for ICT Training and Curriculum Development. Luxembourg: Office for Official Publications of the European Communities, 2004.