郑一群. (2010). 成为企业最需要的人: Become most needed people of company. 中华工商联合出版社.
Dyfyniad Arddull Chicago郑一群. 成为企业最需要的人: Become Most Needed People of Company. 中华工商联合出版社, 2010.
Dyfyniad MLA郑一群. 成为企业最需要的人: Become Most Needed People of Company. 中华工商联合出版社, 2010.
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