Chichester, West Sussex, England ; New York Wiley c1992,
Buku Teks
Yates, Christopher St. J.
Cassell Publisher, 1989
Buku Teks
Yates, Frank
Macmillan Publishing Co., 1981
Buku Teks
Damodaran, Aswath, author
Wharton School Publishing, 2008
Buku Teks
Frost, Frank J.
D.C Heath, 1980
Buku Teks