FileLinkTool will help to make a link to the source file for a derivative work. This tool will be very helpful for the users who are working with derivative works on Wikimedia Commons. Because many creative works are derivative works of some other works, and are entitled to their own copyright. As per the Creative Commons attribution statement, the source has to be mentioned appropriately.
This tool will help you to do the process, just select the text and click the following icon:
, which is added to the toolbar after installing the following script.