Holzner, S. . .. (1995). Visual basic 6: Programming black book. Comdex.
Chicago Style aipamenaHolzner, Steven. Visual Basic 6: Programming Black Book. New Delhi: Comdex, 1995.
MLA aipamenaHolzner, Steven. Visual Basic 6: Programming Black Book. Comdex, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.