Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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