International Commission for the History of Universities, Gabriel, A. L., & Gieysztor, A. (1977). The economic and material frame of the mediaeval university: Proceedings of the International Commission for the History of Universities, held in San Francisco, California (USA), August 27, 1975, (International Congress of Historical Sciences). The Commission.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Commission for the History of Universities, Astrik L. Gabriel, و Aleksander Gieysztor. The Economic and Material Frame of the Mediaeval University: Proceedings of the International Commission for the History of Universities, Held in San Francisco, California (USA), August 27, 1975, (International Congress of Historical Sciences). Notre Dame, Ind.: The Commission, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Commission for the History of Universities, et al. The Economic and Material Frame of the Mediaeval University: Proceedings of the International Commission for the History of Universities, Held in San Francisco, California (USA), August 27, 1975, (International Congress of Historical Sciences). The Commission, 1977.