1. ASA 2010a Complaints and Investigations Process http://www.asa.org.uk/Complaints-and-ASA-action/Dealing-with-complaints/Complaints-and-investigations-process.aspx
2. ASA 2010b Health and Beauty Products and Therapies http://cap.org.uk/The-Codes/CAP-Code/CAP-Code-Item.aspx?q=CAP+Code_Other+Specific+Rules_50++Health+and+beauty+products+and+therapies_General
3. ASA Adjudication 2008 ASA Adjudication on Hidden Hearing Ltd http://www.asa.org.uk/asa/adjudications/Public/TF_ADJ_45478.htm
4. ASA Adjudication 2009 ASA Adjudication on Merit Ltd http://www.asa.org.uk/asa/adjudications/Public/TF_ADJ_45580.htm