Cita APA (7a ed.)

Spear, R. J., & Spear, T. M. (1997). Introduction to computer programming in Visual Basic 6.0. Dryden Press.

Cita Chicago Style (17a ed.)

Spear, Robert J., y Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Fort Worth: Dryden Press, 1997.

Cita MLA (9a ed.)

Spear, Robert J., y Timothy M. Spear. Introduction to Computer Programming in Visual Basic 6.0. Dryden Press, 1997.