Impact of Empire (Organization). Workshop, ebrary, Inc, Hekster, O., Kleijn, G. d., & Slootjes, D. (2007). Crises and the Roman Empire: Proceedings of the Seventh Workshop of the international network Impact of Empire, Nijmegen, June 20-24, 2006. Brill.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Impact of Empire (Organization). Workshop, Inc ebrary, Olivier Hekster, Gerda de Kleijn, و Daniëlle Slootjes. Crises and the Roman Empire: Proceedings of the Seventh Workshop of the International Network Impact of Empire, Nijmegen, June 20-24, 2006. Leiden ; Boston: Brill, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Impact of Empire (Organization). Workshop, et al. Crises and the Roman Empire: Proceedings of the Seventh Workshop of the International Network Impact of Empire, Nijmegen, June 20-24, 2006. Brill, 2007.