Holt, Renehart and Winston , 1971
Buku Teks
Colander, David C.
McGraw-Hill , 2001
Buku Teks
DeLong, J. Bradford
McGraw-Hill, 2002
Buku Teks
Parkin, Michael, 1939-
Prentice-Hall, c1992
Buku Referensi
Colander, David C.
Irwin McGraw-Hill, 2004
Buku Teks