Spear, R. J., & Spear, T. M. (1997). Introduction to computer programming in Visual Basic 6.0. Dryden Press.
Chicago-čujuhus (17. p.)Spear, Robert J., juo Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Fort Worth: Dryden Press, 1997.
MLA-čujuhus (9. p.)Spear, Robert J., juo Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Dryden Press, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.