Brady, James E., author
John Wiley & Sons, 1990
Buku Teks
Hill, John William, 1933-, author
Prentice-Hall, 1999
Buku Teks
Long, G. Gilbert, author
John Wiley & Sons, 1982
Buku Teks
Robert, Julian L., author
W.H. Freeman, 1991
Buku Teks
Whitten, Kenneth W., author
Saunders College, 1992
Buku Teks