King, Kenneth, author
Longmann Group, 1991
Buku Teks
Stevens, Christopher
St. Martin's Press, 1979
Buku Teks
International Legal Center, 1975
Buku Teks
Graham-Brown, Sarah
Longman, 1993
Buku Teks
Beeby, C. E., author
Harvard University Press, 1966
Buku Teks