APA (7th ed.) Citation

Dittrich, S. (1991). Visual Basic. Marcombo.

Chicago Style (17th ed.) Citation

Dittrich, Stefan. Visual Basic. Barcelona: Marcombo, 1991.

MLA (9th ed.) Citation

Dittrich, Stefan. Visual Basic. Marcombo, 1991.

Warning: These citations may not always be 100% accurate.