APA (7th ed.) Zitazioa
Petroutsos, E. Mastering Visual Basic 6. BPB Publications.
Chicago Style (17th ed.) Zitazioa
Petroutsos, Evangelos. Mastering Visual Basic 6. New Delhi: BPB Publications.
MLA (9th ed.) Zitazioa
Petroutsos, Evangelos. Mastering Visual Basic 6. BPB Publications.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.