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Mass Addison-Wesley , 1992
Buku Teks SO
Eitman, David K.
Perason, 2001
Buku Teks SO
Eiteman, David K.
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Buku Teks SO
Shapiro, Alan C.
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Buku Teks
Shapiro, Alan C.
Allyn and Bacon, 1989
Buku Teks SO