APA
Online Training Solutions (Firm), . (2004). Microsoft Office PowerPoint 2003 step by step. Redmond, Wash: Microsoft Press.
Chicago
Online Training Solutions (Firm), . 2004. Microsoft Office PowerPoint 2003 step by step. Redmond, Wash: Microsoft Press.
Harvard
Online Training Solutions (Firm), . (2004). Microsoft Office PowerPoint 2003 step by step. Redmond, Wash: Microsoft Press.
MLA
Online Training Solutions (Firm), . Microsoft Office PowerPoint 2003 step by step. Redmond, Wash: Microsoft Press. 2004.