Dyfyniad APA
Zikmund, W. G., & D'Amico, M. (1996). Marketing (5th ed.). West Publishing.
Dyfyniad Arddull Chicago
Zikmund, William G., and Michael D'Amico. Marketing. 5th ed. Minneapolis: West Publishing, 1996.
Dyfyniad MLA
Zikmund, William G., and Michael D'Amico. Marketing. 5th ed. West Publishing, 1996.
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