Shelly, Gary B., author
Anaheim Publishing, 1984
Buku Teks
Fuori, William M., author
Prentice-Hall, 1991
Buku Teks
Cascarino, Richard, author
John Wiley & Sons, 2007
Buku Teks
Casady, Mona J. author
South-Western Publishing, 1985
Buku Teks
O`Brien, James A., 1936-, author
Richard D. Irwin, 1986
Buku Teks