Panagrosso, D., & Williams, O. (1999). Test prep MCSD Visual Basic 6 exams. New Riders.
Lua i Stíl Chicago (17ú heag.)Panagrosso, David, agus Owen Williams. Test Prep MCSD Visual Basic 6 Exams. Indianapolis, Ind.: New Riders, 1999.
Lua MLA (8ú heag.)Panagrosso, David, agus Owen Williams. Test Prep MCSD Visual Basic 6 Exams. New Riders, 1999.
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