APA (7th ed.) Zitazioa

LEWIS, C. (1942). Preface to paradise lost. O.U.P..

Chicago Style (17th ed.) Zitazioa

LEWIS, C.S. Preface to Paradise Lost. London: O.U.P., 1942.

MLA (9th ed.) Zitazioa

LEWIS, C.S. Preface to Paradise Lost. O.U.P., 1942.