Schultz, D. E., Petrison, L., & Robinson, W. A. (1998). Sales promotion essentials: The 10 basic sales promotion techniques....and how to use them (3rd ed.). NTC Business Books.
Παραπομπή σε μορφή Chicago (17η εκδ.)Schultz, Don E., Lisa Petrison, και William A. Robinson. Sales Promotion Essentials: The 10 Basic Sales Promotion Techniques....and How to Use Them. 3rd ed. Lincolnwood, Ill.: NTC Business Books, 1998.
Παραπομπή σε μορφή MLA (8th εκδ.)Schultz, Don E., et al. Sales Promotion Essentials: The 10 Basic Sales Promotion Techniques....and How to Use Them. 3rd ed. NTC Business Books, 1998.
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