Marcus, Marvin, author
Prentice Hall International, 1992
Buku Teks
Davis, Philip J., author
John Wiley & Sons, 1979
Buku Teks
Liebeck, Pamela
Oxford Pergamon Press 1971,
Buku Teks
EBSCOhost,
Multimedia
Briggs, William L., author
Society for Industrial and Applied Mathematics, 2000
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