Catholic Church Pope (1073-1085 : Gregory VII). (1990). The correspondence of Pope Gregory VII: Selected letters from the Registrum. Columbia University Press.
Chicago-Zitierstil (17. Ausg.)Catholic Church Pope (1073-1085 : Gregory VII). The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. New York: Columbia University Press, 1990.
MLA-Zitierstil (9. Ausg.)Catholic Church Pope (1073-1085 : Gregory VII). The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. Columbia University Press, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.