Capture and pass variables containing source, medium and campaign

Hello,

I have searched through the doc and forum but can’t find anything. I link to a typeform on my website and would like to add some parameters to the URL to open the typeform, containing the source, medium, and campaign visitors had when they landed on the site.

I can’t find any information about how to “capture” them and pass them along during the visit to make I can use them in the link dynamically.

https://www.typeform/dfjshdf?source=google&medium=cpc

Any help would be much appreciated.