APA استشهاد

Kogent Solution. (2010). Excel 2007 in simple steps. Dreamtech.

استشهاد بنمط شيكاغو

Kogent Solution. Excel 2007 in Simple Steps. New Delhi: Dreamtech, 2010.

MLA استشهاد

Kogent Solution. Excel 2007 in Simple Steps. Dreamtech, 2010.