Terpstra, V. (1991). International marketing (5th ed.). The dryden press.
Dyfyniad Arddull ChicagoTerpstra, Vern. International Marketing. 5th ed. Chicago: The dryden press, 1991.
Dyfyniad MLATerpstra, Vern. International Marketing. 5th ed. The dryden press, 1991.
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