Youell, R. (1998). Tourism: An introduction. Harlow, Essex: Addison Wesley Longman.
Trích dẫn kiểu ChicagoYouell, Ray. Tourism: An Introduction. Harlow, Essex: Addison Wesley Longman, 1998.
MLA引文Youell, Ray. Tourism: An Introduction. Harlow, Essex: Addison Wesley Longman, 1998.
警告:這些引文格式不一定是100%准確.