Jones, Hugh
Routledge, 1996
Buku Teks
Owen, Lynette
Routledge, 1996
Buku Teks
Norman, Sandy, author
Facet Publishing, 2004
Buku Teks
Norman, Sandy, author
Library Association Publishing, 1996
Buku Referensi
revised and updated by Sandy Norman
Library Association Publishing, 1999
Buku Teks