魏桂东. (2009). 节约的都是利润: What you have saved is your profit. 石油工业出版社.
Chicago Style (17. basım) Atıf魏桂东. 节约的都是利润: What You Have Saved Is Your Profit. 石油工业出版社, 2009.
MLA (8th ed.) Atıf魏桂东. 节约的都是利润: What You Have Saved Is Your Profit. 石油工业出版社, 2009.
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