APA način citiranja (7. izdanje)
Gratian, a. 1. c., Thompson, A., Gordley, J., & Christensen, K. (1993). The treatise on laws: (Decretum DD. 1-20). Catholic University of America Press.
Čikaški stil citiranja (17. izdanje)
Gratian, active 12th century, Augustine Thompson, James Gordley, i Katherine Christensen. The Treatise on Laws: (Decretum DD. 1-20). Washington, District of Columbia: Catholic University of America Press, 1993.
MLA način citiranja (9. izdanje)
Gratian, active 12th century, et al. The Treatise on Laws: (Decretum DD. 1-20). Catholic University of America Press, 1993.
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