Cita APA (7a ed.)

Asher, M., & Peru, M. (1988). Impossible journey: Two against the Sahara. Viking Penguin.

Cita Chicago Style (17a ed.)

Asher, Michael, y Mariantonietta Peru. Impossible Journey: Two Against the Sahara. New York: Viking Penguin, 1988.

Cita MLA (9a ed.)

Asher, Michael, y Mariantonietta Peru. Impossible Journey: Two Against the Sahara. Viking Penguin, 1988.