HTML in Variable

I am trying to create a variable for use in an email that contains HTML (for a dynamic link). The issues I am having is with the quote signs in the HTML. I cannot seem to get the variable to save with the quotes:

agreementlink = ("Please sign your rental agreement by clicking the following link:<a href=\ "http://creator.zoho.com/carlgifford/vacation-rental/Rental_Agreement/record-edit/Rental_Agreement_View/" + input.RentalAgreementID + "\ ">Rental Agreement</a>");

Is there a way to do this?

Thanks