Walraet, B. (1989). Programming, the impossible challenge. North-Holland.
Cita Chicago Style (17a ed.)Walraet, Bob. Programming, the Impossible Challenge. Amsterdam [etc.]: North-Holland, 1989.
Cita MLA (9a ed.)Walraet, Bob. Programming, the Impossible Challenge. North-Holland, 1989.
Precaución: Estas citas no son 100% exactas.