APA (7th ed.) Zitazioa
Capreolus, J., White, K., Cessario, R., & Pinckaers, S. (2001). On the virtues. Catholic University of America Press.
Chicago Style (17th ed.) Zitazioa
Capreolus, Jean, Kevin White, Romanus Cessario, eta Servais Pinckaers. On the Virtues. Washington, D.C.: Catholic University of America Press, 2001.
MLA (9th ed.) Zitazioa
Capreolus, Jean, et al. On the Virtues. Catholic University of America Press, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.