Harding, K. (1998). Going international English for tourism: Teacher's resource book. New York: Oxford University press.
Trích dẫn kiểu ChicagoHarding, Keith. Going International English for Tourism: Teacher's Resource Book. New York: Oxford University press, 1998.
Trích dẫn MLAHarding, Keith. Going International English for Tourism: Teacher's Resource Book. New York: Oxford University press, 1998.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.