edited by Lorcan Dempsey, Derek Law and Ian Mowat
Library Association Publishing , 1995
Buku Teks SO
edited by Rae A. Earnshaw, John Vince
Springer, 2008
Buku Teks SO
Dian Wulandari
Pusat jasa Perpustakaan dan Informasi ( Perpustakaan Nasional RI), 2012
Artikel Jurnal
Williams, Brian
Meckler, 1992
Buku Referensi
Seefeld, Jurgen
G. Olms, 2011
Buku Teks SO