edited by Colin Harris, Brian Clifford
British Library, 1985
Buku Teks
Norman, Sandy
Library Association Publishing, 1996
Buku Referensi
Greiner, Joy M.
Libraries Unlimited, 2004
Buku Teks
Ted Hughes, 1997
Buku Teks
Harrold, Ann
Library Association, 1986
Buku Referensi