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.
Chicago (17e ed.) Bronvermelding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.
MLA (8e ed.) Bronvermelding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.
Let op: Deze citaties zijn niet altijd 100% accuraat.