reffreal on the source

hi I would like to install the script where it show on the "view source" the place where they got to the site: explanation: if searching the phrase: "freelance" on Google the string that will appear on the html will be : if searching in Yahoo the string will be the same as results [login to view URL];fr=slv1-&p=freelance and that will be on the source if you did it in the past please let me know and show me please thank you