sumber-sumber tugas 4

http://id.wikipedia.org/wiki/Merek
http://www.total.or.id/info.php?kk=Merek
http://frommarketing.blogspot.com/2009/11/pengertian-merek.html
http://id.wikipedia.org/wiki/Hak_cipta
http://www.dgip.go.id/ebscript/publicportal.cgi?.ucid=374&ctid=4&type=0
http://id.wikipedia.org/wiki/Logo