O`Malley John R.
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Buku Teks
Johnson, David E., author
Prentice-Hall, 1981
Buku Teks
Johnson, David E....[et al.]
Prentice-Hall, 1997
Buku Teks
Johnson, David E., author
Prentice-Hall, 1992
Buku Teks
Hayt, William H., author
2002
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