Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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