Cita APA (7a ed.)

Pedro el Venerable, S. c. (1967). The letters of Peter the Venerable. Harvard University Press.

Cita Chicago Style (17a ed.)

Pedro el Venerable, Santo ca. The Letters of Peter the Venerable. Cambridge: Harvard University Press, 1967.

Cita MLA (9a ed.)

Pedro el Venerable, Santo ca. The Letters of Peter the Venerable. Harvard University Press, 1967.