Cita APA (7th ed.)
Halvorson, M. (1999). Learn microsoft visual basic 6.0 now. Prentice Hall of India.
Cita Chicago (17th ed.)
Halvorson, Michael. Learn Microsoft Visual Basic 6.0 Now. New Delhi: Prentice Hall of India, 1999.
Cita MLA (9th ed.)
Halvorson, Michael. Learn Microsoft Visual Basic 6.0 Now. Prentice Hall of India, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.