Cita APA (7th ed.)
Lewis, C. (1960). The four loves (1a. ed.). Georffrey bles.
Cita Chicago (17th ed.)
Lewis, C.S. The Four Loves. 1a. ed. Georffrey bles, 1960.
Cita MLA (9th ed.)
Lewis, C.S. The Four Loves. 1a. ed. Georffrey bles, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.