next to the reference.In the References section, add or remove references. Each control may include up to 10 references total. These may be references to internal policies, documents and websites.
For each reference, enter a description, a URL or both. When providing a URL, you must start the URL with http://, https:// or ftp://. For example, enter http://www.qualys.com to link to the Qualys website. If you don't provide a description, then the URL appears in place of the description. If you don't provide a URL, then there won't be a link to the referenced item.
To add more references, click the Add Reference link. Note that this link is disabled when the limit of 10 references is reached.
To remove a reference, click next to the reference.
User-provided references appear on the Technical Control Information page, which is accessible from the controls list by clicking 
and from reports by clicking the Control ID (CID). When a URL is provided, users can click a link to go directly to the referenced item.