Cita APA (7a ed.)

Lewis, C. S. (1977). The four loves. Fount Paperbacks.

Cita Chicago Style (17a ed.)

Lewis, C. S. The Four Loves. London: Fount Paperbacks, 1977.

Cita MLA (9a ed.)

Lewis, C. S. The Four Loves. Fount Paperbacks, 1977.