Owen, Lynette
Routledge, 1996
Buku Teks
Facet Publishing, 2004
Buku Teks
Cornish, Graham P.
The Library Association, 1991
Buku Teks
James, Francis Edmund Skone
Sweet & Maxwell, 1958
Buku Teks
edited by Kevin Garnett, Gillian Davies, Gwilym Harbottle
Sweet & Maxwell, 2005
Buku Referensi