Dyfyniad APA

KOGENT LEARNING SOLUTION INC. (2011). EXCEL 2007 IN SIMPLE STEPS. DREAMTECH.

Dyfyniad Arddull Chicago

KOGENT LEARNING SOLUTION INC. EXCEL 2007 IN SIMPLE STEPS. NEW DELHI: DREAMTECH, 2011.

Dyfyniad MLA

KOGENT LEARNING SOLUTION INC. EXCEL 2007 IN SIMPLE STEPS. DREAMTECH, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.