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
by J. Dudley Herron [and others]
D.C. Heath, 1987
Buku Teks