Cita APA (7a ed.)

Bahn, P. G., & Vertut, J. (2018). Journey through the ice age. London: Weidenfeld Nicolson, 1997. 240 p.

Cita Chicago Style (17a ed.)

Bahn, Paul G., y Jean Vertut. Journey Through the Ice Age. London: Weidenfeld Nicolson, 1997. 240 P. 2018.

Cita MLA (8a ed.)

Bahn, Paul G., y Jean Vertut. Journey Through the Ice Age. London: Weidenfeld Nicolson, 1997. 240 P. 2018.