Thompson, Willie
Blackwell, 1998
Buku Teks
Watson, George, author
Macmillan, 1991
Buku Teks
Thody, Philip, author
Routledge, 2000
Buku Teks
Cribb, Robert Bridson, author
Longman, 1995
Buku Teks
Milton-Edwards, Beverly, author
Routledge, 2003
Buku Teks