APA aipamena

John R Walker & Josielyn T Walker. (2011). Tourism: Concepts and practices (1st.). Pearson Education.

Chicago Style aipamena

John R Walker and Josielyn T Walker. Tourism: Concepts and Practices. 1st. India: Pearson Education, 2011.

MLA aipamena

John R Walker and Josielyn T Walker. Tourism: Concepts and Practices. 1st. Pearson Education, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.