Keller, kotler, author
Pearson Education, Inc, 2006
Buku Teks
Converse, Paul Dulaney, 1889-, author
Prentice-Hall, 1958
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1996
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2001
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1999
Buku Teks