Citazione Stile APA (7a Edizione)
Gratian, a. 1. c., Thompson, A., Gordley, J., & Christensen, K. (1993). The treatise on laws: (Decretum DD. 1-20). Catholic University of America Press.
Citazione stile Chigago Style (17a edizione)
Gratian, active 12th century, Augustine Thompson, James Gordley, e Katherine Christensen. The Treatise on Laws: (Decretum DD. 1-20). Washington, District of Columbia: Catholic University of America Press, 1993.
Citatione MLA (9a ed.)
Gratian, active 12th century, et al. The Treatise on Laws: (Decretum DD. 1-20). Catholic University of America Press, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.