Cita APA (7a ed.)

Walker R. Robin & Harding K. Keith. (2007). Tourism 2: Class CD. Oxford, Oxford University Press, 2007.

Cita Chicago Style (17a ed.)

Walker R. Robin y Harding K. Keith. Tourism 2: Class CD. Oxford, Oxford University Press, 2007, 2007.

Cita MLA (9a ed.)

Walker R. Robin y Harding K. Keith. Tourism 2: Class CD. Oxford, Oxford University Press, 2007, 2007.