Cita APA (7th ed.)

Walker R. Robin & Harding K. Keith. (2006). Tourism 1: Teacher's Resource Book. New York, Oxford University Press, 2006.

Cita Chicago (17th ed.)

Walker R. Robin i Harding K. Keith. Tourism 1: Teacher's Resource Book. New York, Oxford University Press, 2006, 2006.

Cita MLA (9th ed.)

Walker R. Robin i Harding K. Keith. Tourism 1: Teacher's Resource Book. New York, Oxford University Press, 2006, 2006.