Bradley, Phil
Lawrence Erlbaum Associates, 1999
Buku Teks
Bradley, Phil
Facet Publishing, 2004
Buku Teks
Bradley, Phil
Library Association Publishing, 1999
Buku Referensi
Shelly, Gary B.
Course Technology Cengage Learning, 2012
Buku Teks
Nelson, Stephen L.
Elex Media Komputindo , 1996
Buku Teks