APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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