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