Cita APA (7a ed.)

Gregorio VII, P., & Cowdrey, H. E. J. (1972). The epistolae vagantes of Pope Gregory VII. At the Clarendon Press.

Cita Chicago Style (17a ed.)

Gregorio VII, Papa, y H. E. J. Cowdrey. The Epistolae Vagantes of Pope Gregory VII. Oxford: At the Clarendon Press, 1972.

Cita MLA (9a ed.)

Gregorio VII, Papa, y H. E. J. Cowdrey. The Epistolae Vagantes of Pope Gregory VII. At the Clarendon Press, 1972.