Cita APA (7th ed.)

Emerton, E. (1990). The correspondence of Pope Gregory VII: Selected letters from the registrum. Columbia Univ..

Cita Chicago (17th ed.)

Emerton, Ephraim. The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. New York: Columbia Univ., 1990.

Cita MLA (9th ed.)

Emerton, Ephraim. The Correspondence of Pope Gregory VII: Selected Letters from the Registrum. Columbia Univ., 1990.