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.
MLA引文Walker, Robin. Tourism 1 (Student's Book). Oxford University press, 2016.
警告：这些引文格式不一定是100％准确.