Cita APA (7th ed.)

Duffy, R. E. (1995). Introduction to programming with Visual Basic. Que E & T.

Cita Chicago (17th ed.)

Duffy, Ralph E. Introduction to Programming with Visual Basic. Indianapolis, Ind: Que E & T, 1995.

Cita MLA (9th ed.)

Duffy, Ralph E. Introduction to Programming with Visual Basic. Que E & T, 1995.