Crawford, John
Evaluation of library and information services
Aslib, 2000
Buku Teks
CICI directory of information products and services 1990
Longman, 1990
Buku Referensi
Access : Asia's Newspaper on Electronic Information Products & Services
iGroup (asia Pacific), 2006
Majalah, Jurnal, Buletin
Heldman, Robert K.
Information telecommunications: networks, products and services/Robert K. Heldman
McGraw-Hill , 1994
Buku Teks
Roberts, Sue
Managing information services
Facet Publishing, 2004
Buku Teks