| TNS Global | http://www.tns-global.com/ |
| WPP | http://www.wpp.com/wpp/ |
| Kantar | http://www.kantar.com/ |
| TNS Gallup Sverige | http://www.tns-gallup.se/ |
| TNS Gallup Norge | http://www.tns-gallup.no/ |
| TNS Gallup Finland | http://www.tns-gallup.fi/ |
| ESOMAR | http://www.esomar.org/ |
| EFAMRO | http://www.efamro.com/ |
| Dansk Standard ISO certificering | http://www.ds.dk |