Gaya APA

S., P, D. (2004). Letters 121-150. Transl. by Owen J. Blum & Irven M. Resnick. . Washington: Washington Catholic University of America Press.

Gaya MLA

S., Petrus, Damianus,. "Letters 121-150. Transl. by Owen J. Blum & Irven M. Resnick. ". Washington: Washington Catholic University of America Press, 2004. Buku.