J. OLeay Timothy, & J. OLeay Linda. (2007). Microsoft Office Excel 2007 Brief. American: MC Graw Hill.
Trích dẫn kiểu ChicagoJ. OLeay Timothy, và J. OLeay Linda. Microsoft Office Excel 2007 Brief. American: MC Graw Hill, 2007.
Deismireacht MLAJ. OLeay Timothy, và J. OLeay Linda. Microsoft Office Excel 2007 Brief. American: MC Graw Hill, 2007.
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