Walker, R., & Harding, K. (2007). Tourism: Teacher's resource book. New York: Oxford university Press.
Trích dẫn kiểu ChicagoWalker, Robin., và Keith Harding. Tourism: Teacher's Resource Book. New York: Oxford university Press, 2007.
Deismireacht MLAWalker, Robin., và Keith Harding. Tourism: Teacher's Resource Book. New York: Oxford university Press, 2007.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.