APA

Harding K., . (2006). Tourism 1 : Student ́s Book. Oxford: Oxford University Press.

Chicago

Harding Keith, . 2006. Tourism 1 : Student ́s Book. Oxford: Oxford University Press.

Harvard

Harding K., . (2006). Tourism 1 : Student ́s Book. Oxford: Oxford University Press.

MLA

Harding Keith, . Tourism 1 : Student ́s Book. Oxford: Oxford University Press. 2006.