You can view and edit the sources that appear for your clients in Local SEO and Reputation Management by logging into Partner Center and selecting Administration > Customize > Listing Sources.
The selected sources will be available for all accounts created on your platform. You can also remove sources on a per-account basis (in Reputation Management only) by logging into/impersonating an account and editing the selected Listings.
View Vendasta's Review and Listing Sources below. Please be advised that these sources are subject to change at any time.