Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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