Dyfyniad APA

J. OLeay Timothy, & J. OLeay Linda. (2007). Microsoft Office Excel 2007 Brief. American: MC Graw Hill.

Dyfyniad Arddull Chicago

J. OLeay Timothy, và J. OLeay Linda. Microsoft Office Excel 2007 Brief. American: MC Graw Hill, 2007.

Dyfyniad MLA

J. OLeay Timothy, và J. OLeay Linda. Microsoft Office Excel 2007 Brief. American: MC Graw Hill, 2007.

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