Cita APA (7th ed.)
Lewis, C. S. (1991). The four loves. Harcourt Brace Jovanovich.
Cita Chicago (17th ed.)
Lewis, C. S. The Four Loves. New York: Harcourt Brace Jovanovich, 1991.
Cita MLA (9th ed.)
Lewis, C. S. The Four Loves. Harcourt Brace Jovanovich, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.