Cita APA (7th ed.)

Lewis, C. (1980). Mere christianity (Rev ed.). HarperSanFrancisco.

Cita Chicago (17th ed.)

Lewis, C.S. Mere Christianity. Rev ed. New YOrk: HarperSanFrancisco, 1980.

Cita MLA (9th ed.)

Lewis, C.S. Mere Christianity. Rev ed. HarperSanFrancisco, 1980.