The New oxford companion to music
edited by Denis Arnold
Oxford University Press, 1992
 Buku Referensi
Walker, David M.
The Oxford Companion to Law
Clarendon Press, 1980
 Buku Teks
Walker, David M.
The oxford companion to law
Clarendon Press, 1980
 Buku Referensi
The New Oxford companion to literature in French
edited by Peter France
Clarendon Press, 1995
 Buku Referensi
Pritchard, John
The new Penguin guide to the law
Viking, 1992
 Buku Referensi