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 (17th ed.) Citation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.) Citation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.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.