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Buku Referensi
Onno W. Purbo, Adnan Basalamah, Ismail Fahmi, Achmad Hasni Thamrin
Elex Media Komputindo, 1998
Buku Referensi
Zweig, Gunter
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Buku Teks
Zweig, Gunter
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Buku Teks
Whitaker, Arthur P.
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Buku Teks