by Dale H. Besterfield ... [and others]
Prentice-Hall, 1995
Buku Teks
Fandy Tjiptono
Andi Offset, 1996
Buku Teks
Hradesky, John L.
McGraw-Hill, 1995
Buku Referensi
Goetsch, David L.
Pearson, 2016
Buku Teks
by Greg Bounds [and others]
McGraw-Hill, 1994
Buku Teks