Slager, D. (2016). Essential Excel 2016: A step-by-step guide. apress.
Chicago Style (17th ed.) ZitazioaSlager, David. Essential Excel 2016: A Step-by-step Guide. usa: apress, 2016.
MLA (9th ed.) ZitazioaSlager, David. Essential Excel 2016: A Step-by-step Guide. apress, 2016.
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