Wooldridge, Susan, author
Auerbach, 1973
Buku Teks
Filman, Robert E., author
McGraw-Hill, 1984
Buku Teks
Keen, Jeffrey S.
John Wiley & Sons, 1981
Buku Teks
Zells, Lois, author
QED Information Sciences, 1990
Buku Referensi
Ayres, James J., author
New York: John Wiley & Sons, 1990,
Buku Referensi