Cita APA (7a ed.)
Halvorson, M. (2001). Microsoft visual basic 6.0 professional: Step by step. Prentice Hall of India.
Cita Chicago Style (17a ed.)
Halvorson, Michael. Microsoft Visual Basic 6.0 Professional: Step by Step. New Delhi: Prentice Hall of India, 2001.
Cita MLA (9a ed.)
Halvorson, Michael. Microsoft Visual Basic 6.0 Professional: Step by Step. Prentice Hall of India, 2001.
Precaución: Estas citas no son 100% exactas.