Spear, R. J., & Spear, T. M. (1997). Introduction to computer programming in Visual Basic 6.0. Dryden Press.
Lua i Stíl Chicago (17ú heag.)Spear, Robert J., agus Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Fort Worth: Dryden Press, 1997.
Lua MLA (9ú heag.)Spear, Robert J., agus Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Dryden Press, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.