Dyfyniad APA

Zikmund, W. G., & D'Amico, M. (1995). Effective marketing: Creating and keeping customers. West.

Dyfyniad Arddull Chicago

Zikmund, William G., and Michael D'Amico. Effective Marketing: Creating and Keeping Customers. Minneapolis: West, 1995.

Dyfyniad MLA

Zikmund, William G., and Michael D'Amico. Effective Marketing: Creating and Keeping Customers. West, 1995.

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