Koyama, D. K. (1935). Foreign trade business methods: On Japanese principles and practice. Tokyo: Maruzen Company.
Chicago-stil citatKoyama, Denzo K. Foreign Trade Business Methods: On Japanese Principles and Practice. Tokyo: Maruzen Company, 1935.
MLA-referensKoyama, Denzo K. Foreign Trade Business Methods: On Japanese Principles and Practice. Tokyo: Maruzen Company, 1935.
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