Russo, Steve, author
Pearson Benjamin Cummings, 2007
Buku Teks
Brady, James E., author
John Wiley & Sons, 1981
Buku Teks
Hicks, John, author
MAcMillan Press , 1972
Buku Teks
Burns, Ralph A., author
Prentice-Hall, 1995
Buku Teks
Compton, Charles, author
McGarw-Hill, 1979
Buku Teks