Cita APA (7a ed.)

Gregori I, p. (1508). [Epistole]. Ulrich Gering i Berthold Rembolt.

Cita Chicago Style (17a ed.)

Gregori I, papa. [Epistole]. Paris: Ulrich Gering i Berthold Rembolt, 1508.

Cita MLA (9a ed.)

Gregori I, papa. [Epistole]. Ulrich Gering i Berthold Rembolt, 1508.