Carlson, Randall L., author
St. Martin's Press, 1996
Buku Teks
Beer, Francis A
Halt, Rinehart, 1970
Buku Teks
Rosenberg, Jerry M., author
John Wiley & Sons, 1987
Buku Referensi
Harries, Steve, author
Library Assocantion Publishing, 1993
Buku Teks
Raieli, Roberto, author
Chandos, 2013
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