APA (7th ed.) Zitazioa
Content Development Group. (2002). Visual basic 6.0 programming. Tata McGraw Hill.
Chicago Style (17th ed.) Zitazioa
Content Development Group. Visual Basic 6.0 Programming. New Delhi: Tata McGraw Hill, 2002.
MLA (9th ed.) Zitazioa
Content Development Group. Visual Basic 6.0 Programming. Tata McGraw Hill, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.