Hall, James A., author
Thomson/South-Western, 2011
Buku Teks
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
Martin, James, author
Prentice-Hall, 1989
Buku Teks