Walkenbach, J. (2013). Excel 2013 bible. Wiley.
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Dyfyniad Arddull Chicago
Walkenbach, John. Excel 2013 Bible. Indianapolis: Wiley, 2013.
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Dyfyniad MLA
Walkenbach, John. Excel 2013 Bible. Wiley, 2013.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.