Bodnar, George H., author
Prentice Hall International, 1995
Buku Teks
Wilkinson, Joseph W., author
John Wiley & Sons, 1991
Buku Teks
Bodnar, George H., author
Prentice Hall International, 1998
Buku Teks
Martin, Mearle, author
Prentice-Hall, 2003
Buku Teks
Romney, Marshall B., author
Prentice-Hall, 2003
Buku Teks