APA (7th ed.) Citation

Peter Damian, S. (1998). Letters 91-120. Catholic University of America.

Chicago Style (17th ed.) Citation

Peter Damian, Saint. Letters 91-120. Washington, D.C: Catholic University of America, 1998.

MLA (9th ed.) Citation

Peter Damian, Saint. Letters 91-120. Catholic University of America, 1998.