Cita APA (7th ed.)
Halvorson, M. (2008). Microsoft visual basic 2008: Step by step. P.H.I.
Cita Chicago (17th ed.)
Halvorson, Michael. Microsoft Visual Basic 2008: Step by Step. New Delhi: P.H.I, 2008.
Cita MLA (9th ed.)
Halvorson, Michael. Microsoft Visual Basic 2008: Step by Step. P.H.I, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.