International Congress of Papyrology University of Michigan), American Society of Papyrologists., & Samuel, D. H. 1. (1970). Proceeding of the Twelfth International Congress of Papirology: Michigan 13-17 August 1970. Toronto: A. M. Hakkert.
استشهاد بنمط شيكاغوInternational Congress of Papyrology University of Michigan), American Society of Papyrologists, و Deborah H. 1938- Samuel. Proceeding of the Twelfth International Congress of Papirology: Michigan 13-17 August 1970. Toronto: A. M. Hakkert, 1970.
MLA استشهادInternational Congress of Papyrology University of Michigan), American Society of Papyrologists, و Deborah H. 1938- Samuel. Proceeding of the Twelfth International Congress of Papirology: Michigan 13-17 August 1970. Toronto: A. M. Hakkert, 1970.