Davies, Jack, author
West Publishing, 1975
Buku Teks
Gellhorn, Ernest, author
West Publishing Company, 1972
Buku Teks
Davies, Jack
West Group, 1986
Buku Teks
Gellhorn, Ernest, author
West , 1994
Buku Teks
Dobbyn, John F., author
West Publishing, 1989
Buku Teks