Walker, R. (2016). Tourism 1 (Student's Book). Oxford University press.
Trích dẫn kiểu ChicagoWalker, Robin. Tourism 1 (Student's Book). Oxford University press, 2016.
Deismireacht MLAWalker, Robin. Tourism 1 (Student's Book). Oxford University press, 2016.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.