郑小兰. (2008). 他信力: Power of confidence with others. 天津人民出版社.
Chicago Style (17th ed.) Citation郑小兰. 他信力: Power of Confidence with Others. 天津人民出版社, 2008.
MLA citiranje郑小兰. 他信力: Power of Confidence with Others. 天津人民出版社, 2008.
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