7. The method of claim 1 , wherein the electronic document comprises a link to a legitimacy rating document, wherein the legitimacy rating document comprises additional legitimacy rating information.
1. A computer-implemented method for providing a legitimacy rating of a content source, comprising: receiving, by a computer system, a request for a document, the request comprising a request for a document associated with a concept; providing, by the computer system, an electronic document by a document provider based on the request, wherein the electronic document is associated with a content source and selected based on a relevance to the concept; and providing, by the computer system, a legitimacy rating of the content source wherein the legitimacy rating is based on a history rating and a transaction volume rating and wherein at least one of the history rating and the transaction volume rating comprise a metric that is normalized based on at least one of history ratings and transaction volume ratings of a plurality of content sources who provide documents to the document provider.