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4. 顧客關係管理: 掌握客群 = Customer relationship management: grasp customer 鄭紹成, 新北市 : 華立圖書股份有限公司, 2023. BUS523
5. International economics: theory & policy Krugman, Paul R., Harlow, Essex : Pearson Education Limited, [2023] ECON320 ECON334
6. International business Geringer, J. Michael (John Michael), New York, NY : McGraw Hill LLC, [2023]. BUS417
