Terpstra, V. (1994). International marketing (6th.ed.). Dryden.
Lua i Stíl Chicago (17ú heag.)Terpstra, Vern. International Marketing. 6th.ed. Fort Worth: Dryden, 1994.
Lua MLA (9ú heag.)Terpstra, Vern. International Marketing. 6th.ed. Dryden, 1994.
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