Proclus ca. 410-485, Opsomer, J., & Steel, C. G. (2003). On the existence of evils. Cornell University Press.
Chicago Style aipamenaProclus ca. 410-485, Jan Opsomer, and Carlos G. Steel. On the Existence of Evils. Ithaca, N.Y: Cornell University Press, 2003.
MLA aipamenaProclus ca. 410-485, et al. On the Existence of Evils. Cornell University Press, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.