Humi, Mayer, author
Pros-Kent, 1992
Buku Teks
Haberman, Richard, author
Pearson Prentice Hall, 2004
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Longman Scientific & Technical, 1991
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Boyce, William E., author
John Wiley & Sons, 1997
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LeVeque, Randall J., author
Society for Industrial and Applied Mathematics, 2007
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