If you want to display both Google and Facebook Reviews in the same Feed (Widget) or combine multiple review sources, please follow the steps below.
1. Access one of your 'Widgets' by clicking on 'Edit':
2. Go to the 'Sources' tab and just select the sources you want to display in the widget displayed on your website:
Both your Google and Facebook reviews will be combined into one widget, here's a preview of how this will look like: