APA

Cornell G., .Visual Basic 6 from the Ground Up. MCGRAW-HILL HIGHER EducaTION:London.2011: .

Chicago

Cornell Gary, .Visual Basic 6 from the Ground Up. MCGRAW-HILL HIGHER EducaTION:London.2011: .

Harvard

Cornell G., .Visual Basic 6 from the Ground Up. MCGRAW-HILL HIGHER EducaTION:London.2011: .

MLA

Cornell Gary, .MCGRAW-HILL HIGHER EducaTION:London.2011: . .