Chiras, Daniel D.
The Benyamin/Cumings Publishing Company, 1985
Buku Teks
Anderson, David
South-Western College Publishing, 2000
Buku Teks
Turner, Mark
Kumarian Press, Inc, 1997
Buku Teks
Mathur, Kamlesh
Prentice-Hall, 1994
Buku Teks
Spaeth, Harold J.
W.H.Freeman and Company, 1976
Buku Teks