Drozdek, Adam
Brooks Cole, 2000
Buku Teks
Weiss, Mark Allen
The Benjamins/Cummings Publishing Company, Inc. , 1994
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Langsam, Yedidyah
Prentice-Hall, 1996
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Goodrich, Michael T.
John Wiley & Sons, 2011
Buku Teks
Goodrich, Michael T.
John Wiley & Sons, 2001
Buku Teks