Artikel Jurnal
Viswanathan, C.G.
Print House, 1985
Buku Referensi
Molz, Redmond Kathleen, author
N.J Scarecroe Press, 1990
Buku Teks
Breisch, Kenneth A., author
MIT Press, c1997
Buku Teks
Elliott, Donald S., author
[American Library association, American Library association], 2007
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