APA (7th ed.) Zitazioa

Lehrer, K. (1990). Theory of knowledge. Routledge.

Chicago Style (17th ed.) Zitazioa

Lehrer, Keith. Theory of Knowledge. London: Routledge, 1990.

MLA (9th ed.) Zitazioa

Lehrer, Keith. Theory of Knowledge. Routledge, 1990.