Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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