Sources

Internet:

http://www.wendys.com/

http://nl.wikipedia.org/wiki/Marketingmix

http://www.12manage.com/methods_marketing_mix_nl.html

http://www.interglot.nl/

http://www.dennys.com/

http://www.school33.org/highlights/highlight_images/Wendys_RGBweb.jpg

Interviews:
1 management interview
8 customer interviews