Cita APA (7th ed.)

Bahn, P. G., & Vertut, J. (1997). Journey through the ice age. Weidenfeld and Nicolson.

Cita Chicago (17th ed.)

Bahn, Paul G., i Jean Vertut. Journey Through the Ice Age. London: Weidenfeld and Nicolson, 1997.

Cita MLA (9th ed.)

Bahn, Paul G., i Jean Vertut. Journey Through the Ice Age. Weidenfeld and Nicolson, 1997.