Longkutoy, John J., author
Mutiara Sumber Widya, 1987
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Longkutoy, John J., author
Mutiara Sumber Widya, 1985
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O`Malley, Timothy J., author
Tab Books, 1983
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Dina Heryanto, author
Elex Media Komputindo, 1988
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Microsoft, 1987
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