Cita APA (7a ed.)

Lewis, C. S., & Elloway, D. (1981). Out of the silent planet. Longman.

Cita Chicago Style (17a ed.)

Lewis, C. S., y David Elloway. Out of the Silent Planet. Essex: Longman, 1981.

Cita MLA (9a ed.)

Lewis, C. S., y David Elloway. Out of the Silent Planet. Longman, 1981.