Gunn, I. (2013). BTEC business level 2 assessment guide, Unit 5, Sales and personal selling: = Sales and personal selling. Hodder Education.
Chicago-Zitierstil (17. Ausg.)Gunn, Ian. BTEC Business Level 2 Assessment Guide, Unit 5, Sales and Personal Selling: = Sales and Personal Selling. London: Hodder Education, 2013.
MLA-Zitierstil (9. Ausg.)Gunn, Ian. BTEC Business Level 2 Assessment Guide, Unit 5, Sales and Personal Selling: = Sales and Personal Selling. Hodder Education, 2013.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.