APA (7th ed.) Zitazioa
Jordan, R. W. (1992). Ancient concepts of philosophy. Routledge.
Chicago Style (17th ed.) Zitazioa
Jordan, Robert William. Ancient Concepts of Philosophy. London ; New York: Routledge, 1992.
MLA (9th ed.) Zitazioa
Jordan, Robert William. Ancient Concepts of Philosophy. Routledge, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.