Cita APA (7a ed.)

Lewis, C. S. (1963). A preface to Paradise lost. Oxford University Press.

Cita Chicago Style (17a ed.)

Lewis, C. S. A Preface to Paradise Lost. London: Oxford University Press, 1963.

Cita MLA (9a ed.)

Lewis, C. S. A Preface to Paradise Lost. Oxford University Press, 1963.