Sion, C. (2004). Talking business in class: Speaking activities for professional students (1. publ.). Delta Publ.
Chicago-Zitierstil (17. Ausg.)Sion, Chris. Talking Business in Class: Speaking Activities for Professional Students. 1. publ. Addlestone: Delta Publ, 2004.
MLA-Zitierstil (9. Ausg.)Sion, Chris. Talking Business in Class: Speaking Activities for Professional Students. 1. publ. Delta Publ, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.