Words and phrases : legally defined, third edition, volume 2
under the general editorship of John B. Saunders
Butterworth, 1988
 Buku Referensi
Words and phrases : legally defined, third edition, volume 1
under the general editorship of John B. Saunders
Butterworth, 1988
 Buku Referensi
Words and phrases : legally defined, third edition, volume 4
under the general editorship of John B. Saunders
Butterworth, 1990
 Buku Referensi
Words and phrases : legally defined
David Hay
London : Routterworths, 1993,
 Buku Referensi
The Encyclopaedia of Islam : new edition, volume 3
E.J. Brill, 1978
 Buku Referensi