APA (7th ed.) Citation
Halvorson, M. (2008). Microsoft Visual Basic 2008 step by step. Microsoft press.
Chicago Style (17th ed.) Citation
Halvorson, Michael. Microsoft Visual Basic 2008 Step by Step. Redmond, Wash.: Microsoft press, 2008.
MLA (9th ed.) Citation
Halvorson, Michael. Microsoft Visual Basic 2008 Step by Step. Microsoft press, 2008.
Warning: These citations may not always be 100% accurate.