edited by Lorcan Dempsey, Derek Law and Ian Mowat
Library Association Publishing , 1995
Buku Teks
edited by Rae A. Earnshaw, John Vince
Springer, 2008
Buku Teks SO
Williams, Brian
Meckler, 1992
Buku Referensi
Seefeld, Jurgen
G. Olms, 2011
Buku Teks
Crawford, Walt
American Library Association, 1995
Buku Teks SO