Rose, Francis, author
Sweet & Maxwell, 1989
Buku Teks
Gellhorn, Ernest, author
West , 1994
Buku Teks
Dobbyn, John F., author
West Publishing, 1989
Buku Teks
Lowe, John S., author
West Publishing, 1995
Buku Teks
Loewy, Arnold H.
St.paul Minn, 1987
Buku Teks