Lindsay Allanson-Jones, editor
Cambridge Univ Press, 2011
Buku Teks
edited by Paul Brassley, Jeremy Burchardt and Karen Sayer
Routledge, 2017
Buku Teks
Mackay, Robert, 1940-, author
UCL Press, 1999
Buku Teks
Equal Opportunities Commission
Her Majesty's Stationery Office, 1987
Buku Referensi
Gregg, Pauline, author
George G. Harrap, 1952
Buku Teks