Singh, U.K., author
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Buku Referensi
Barrie, Donald S., author
McGraw-Hill, 1978
Buku Teks
Kastantin, Joseph T., author
Quorum Books, 1988
Buku Teks
Joseph, William, author
McGraw-Hill, 1983
Buku Teks
T. Kanti Srikantaiah, Michael E.D. Koenig, editor
Information Today, 2000
Buku Teks