Cita APA

Walker, R., & Harding, K. (2009). Tourism 3: Student's book. Oxford: Oxford University Press.

Citación estilo Chicago

Walker, Robin, y Keith Harding. Tourism 3: Student's Book. Oxford: Oxford University Press, 2009.

Cita MLA

Walker, Robin, y Keith Harding. Tourism 3: Student's Book. Oxford: Oxford University Press, 2009.