Fandy Tjiptono
Andi Offset, 1996
Buku Teks
by Howard S. Gitlow [and others]
McGraw-Hill , 2005
Buku Teks
by Howard S. Gitlow [and others]
McGraw-Hill, 2005
Buku Teks
Hradesky, John L.
McGraw-Hill, 1995
Buku Referensi
Evans, James Robert, 1950-
South-Western, 2002
Buku Teks