European Conference on e-Learning Groningen, Netherlands, & Beldhuis, H. (2012). Proceedings of the 11th European Conference on eLearning: University of Groningen, The Netherlands, 26-27 October 2012. Academic Publishing International Limited.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)European Conference on e-Learning Groningen, Netherlands, و Hans Beldhuis. Proceedings of the 11th European Conference on ELearning: University of Groningen, The Netherlands, 26-27 October 2012. Reading, UK: Academic Publishing International Limited, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)European Conference on e-Learning Groningen, Netherlands, و Hans Beldhuis. Proceedings of the 11th European Conference on ELearning: University of Groningen, The Netherlands, 26-27 October 2012. Academic Publishing International Limited, 2012.