Nagpal, D. (1999). Questions and answers in computer science 'O'Level. Wheeler Publishing.
Dyfyniad Arddull ChicagoNagpal, D.P. Questions and Answers in Computer Science 'O'Level. New Delhi: Wheeler Publishing, 1999.
Dyfyniad MLANagpal, D.P. Questions and Answers in Computer Science 'O'Level. Wheeler Publishing, 1999.
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