APA (7th ed.) Citation

Catholic Church, Richter, A. L., Friedberg, E., & Gratian, a. 1. c. (1959). Corpus iuris canonici (Ed. lipsiensis 2.). Akademische Druck- u. Verlagsanstalt.

Chicago Style (17th ed.) Citation

Catholic Church, Aemilius Ludwig Richter, Emil Friedberg, and active 12th century Gratian. Corpus Iuris Canonici. Ed. lipsiensis 2. Graz: Akademische Druck- u. Verlagsanstalt, 1959.

MLA (9th ed.) Citation

Catholic Church, et al. Corpus Iuris Canonici. Ed. lipsiensis 2. Akademische Druck- u. Verlagsanstalt, 1959.