Brown, F.E.
Addison Wesley c. , 1980
Buku Teks
Uhl, Kenneth P., author
John Wiley & Sons, 1969
Buku Teks
Grunig, Rudolf, author
Pringer, 2005
Buku Teks
Leleur, Steen, author
[Springer-Verlag, ], 2012
eBooks
Kotler, Philip, author
The Free Press , 1997
Buku Teks