APA引文

Youell, R. (1996). Travel and tourism: Optional units, advanced GNVQ. Harrow: Longman.

Trích dẫn kiểu Chicago

Youell, Ray. Travel and Tourism: Optional Units, Advanced GNVQ. Harrow: Longman, 1996.

MLA引文

Youell, Ray. Travel and Tourism: Optional Units, Advanced GNVQ. Harrow: Longman, 1996.

警告：這些引文格式不一定是100％准確.