Cita APA (7th ed.)

Halvorson, M. (1999). Aprenda microsoft visual basic 6.0 ya. McGraw Hill.

Cita Chicago (17th ed.)

Halvorson, Michael. Aprenda Microsoft Visual Basic 6.0 Ya. Madrid: McGraw Hill, 1999.

Cita MLA (9th ed.)

Halvorson, Michael. Aprenda Microsoft Visual Basic 6.0 Ya. McGraw Hill, 1999.