When it comes to 3 different solutions to communicate it can be hard, especially when you can't really extract the lead source in SalesForce, because Google Analytics with their universal tracking code gathered everything in the same cookie, and so the data is longer readable for Marketo. In this presentation, you will see how to track really where the converted visitor is coming from (organic, direct, social, utm strings etc...) and how to send this data by Marketo to SalesForce. If you have any questions, ask them in the comments, I will be glad to answer to them.