Walker, R. (2006). English for careers tourism student’s book 1. Oxford University Press.
Trích dẫn kiểu ChicagoWalker, Robin. English for Careers Tourism Student’s Book 1. Oxford University Press, 2006.
MLA引文Walker, Robin. English for Careers Tourism Student’s Book 1. Oxford University Press, 2006.
警告：這些引文格式不一定是100％准確.