W.H. Freeman and Company, 2002
Buku Teks SO
Campbell, Mary K.
Brooks/Cole Cengage Learning, 2008
Buku Teks SO
Mathews, Christopher K.
Addison-Wesley, 2000
Buku Teks
Glick, David
Appleton & lange , 1995
Buku Teks SO
Rastogi, S.C.
Tata McGraw-Hill, 1995
Buku Teks SO