Cita APA (7a ed.)

Gratian, a. 1. c., & Larson, A. A. (2016). Gratian's Tractatus de penitentia. The Catholic University of America Press.

Cita Chicago Style (17a ed.)

Gratian, active 12th century, y Atria A. Larson. Gratian's Tractatus De Penitentia. Washington, D.C.: The Catholic University of America Press, 2016.

Cita MLA (8a ed.)

Gratian, active 12th century, y Atria A. Larson. Gratian's Tractatus De Penitentia. The Catholic University of America Press, 2016.