Anderson, David
South-Western College Publishing, 2000
Buku Teks
by G.D. Eppen ... [et.al.]
Prentice Hall International, 1998
Buku Teks
edited by I. Arjang Assad, Edward A. Wasil, Gary L. Lilien
Prentice-Hall, 1992
Buku Referensi
Mingers, John, author
Springer, 2006
Buku Teks
Schniederjans, Marc J., author
Allyn and Bacon, 1992
Buku Teks