Peter, J. Paul, author
McGrow-Hill, 2015
Buku Teks
Peter, J. Paul, author
Plano, Tex. Business Publication 1982,
Buku Teks
Keller, kotler, author
Pearson Education, Inc, 2006
Buku Teks
Kotler, Philip, author
[publisher not identified], [date of publication not identified]
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2000
Buku Teks