Evans, James Robert, 1950-
South-Western, 2002
Buku Teks
Evans, James Robert, 1950-
South Western Cengage Learning, 2011
Buku Teks
Hradesky, John L.
McGraw-Hill, 1995
Buku Referensi
Bank, John
Prentice-Hall, 2000
Buku Teks
Fandy Tjiptono
Andi Offset, 1996
Buku Teks