Zikmund, W. G., & D'Amico, M. (1998). Effective marketing: Creating and keeping customers (2nd ed.). Cincinnati, OH: South-Western College.
Trích dẫn kiểu ChicagoZikmund, William G., và Michael D'Amico. Effective Marketing: Creating and Keeping Customers. 2nd ed. Cincinnati, OH: South-Western College, 1998.
Deismireacht MLAZikmund, William G., và Michael D'Amico. Effective Marketing: Creating and Keeping Customers. 2nd ed. Cincinnati, OH: South-Western College, 1998.
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