To filter CVs by source in Eightfold Talent Acquisition, follow these steps:

1. Open the position for which you want to filter CVs.
2. Click on View -> select New Referral from the options.

By following these steps, you will be able to filter and view only referral CVs for the selected position.

If you are not able to filter CVs, reach out to your support team and they would be able to assist you further.