APA (7th ed.) Zitazioa
Unger, P. K. (1975). Ignorance: A case for scepticism. Clarendon Press.
Chicago Style (17th ed.) Zitazioa
Unger, Peter K. Ignorance: A Case for Scepticism. Oxford [Eng.]: Clarendon Press, 1975.
MLA (9th ed.) Zitazioa
Unger, Peter K. Ignorance: A Case for Scepticism. Clarendon Press, 1975.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.