Cornish, Graham P.
The Library Association, 1991
Buku Teks
Jones, Hugh
Routledge, 1996
Buku Teks
James, Francis Edmund Skone
Sweet & Maxwell, 1958
Buku Teks
edited by Kevin Garnett, Gillian Davies, Gwilym Harbottle
Sweet & Maxwell, 2005
Buku Referensi
Marett, Paul
Gower , 1991
Buku Teks