Cita APA (7a ed.)

Dawkins, R., & Ward, L. (2006). Climbing mount improbable. Penguin Books.

Cita Chicago Style (17a ed.)

Dawkins, Richard, y Lalla Ward. Climbing Mount Improbable. London [etc.]: Penguin Books, 2006.

Cita MLA (9a ed.)

Dawkins, Richard, y Lalla Ward. Climbing Mount Improbable. Penguin Books, 2006.