Ruder, Jesse H., author
John Wiley & Sons, 1987
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Ian Chandra K., author
Elex Media komputindo, 1991
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Erizal Novia, author
Ganeca Exact, 1986
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Markowitz, Harry M., author
Prentice-Hall, 1963
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Grisworld, Ralph E.
Prentice-Hall, 1983
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