APA (7th ed.) Citation

Lewis, C. S. (1942). A Preface to Paradise lost. O.U.P.

Chicago Style (17th ed.) Citation

Lewis, C. S. A Preface to Paradise Lost. Oxford: O.U.P, 1942.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.