Sueur, AP.Le
Covendish Publishing Limited, 1995
Buku Teks
Thompson, Brian
Balckstone Press Limited, s.a.
Buku Teks
Phillips, O. Hood, author
Sweet & Maxwell, 2001
Buku Teks
Clancey, Richad, author
Sweet & Maxwell, 2011
Buku Teks
Carroll, Alex, 1947-, author
Pearson Longman, 2007
Buku Teks