Burton, William C.
New York : Macmillan, 1992,
Buku Referensi
Bloomsbury Publishing Limited, 1993
Buku Referensi
edited by Susan M. Lloyd
Penguin Books, [date of publication not identified]
Buku Referensi
Zultanawar
Badan Pembinaan Hukum Nasional, Kementerian Hukum dan HAM Republik Indonesia, 1978
Buku Teks
Penguin Books, 1987
Buku Referensi