Cita APA

Waring, R. (2009). Volcano trek. London ; United States: Heinle, Cengage Learning.

Chicago Style Citation

Waring, Rob. Volcano Trek. London ; United States: Heinle, Cengage Learning, 2009.

Cita MLA

Waring, Rob. Volcano Trek. London ; United States: Heinle, Cengage Learning, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.