Cita APA (7a ed.)

Peter Damian, S., Resnick, I. M., & Blum, O. J. (1989). Letters, 61-90. Catholic University of America Press.

Cita Chicago Style (17a ed.)

Peter Damian, Saint, Irven M. Resnick, y Owen J. Blum. Letters, 61-90. Washington, D.C.: Catholic University of America Press, 1989.

Cita MLA (8a ed.)

Peter Damian, Saint, et al. Letters, 61-90. Catholic University of America Press, 1989.