Hudson, Alastair, author
Sweet & Maxwell, 2000
Buku Teks
editor, Robert Pritchard
Kluwer Law International, 1996
Buku Teks
Ministry of Communication and Information Technology, 2008
Buku Referensi
Stillman, Richard N.
Holt, Rinehart and Wilson, 1962
Buku Teks
Buku Teks