There is no specific link for creating a referral tracker. To do it and for easier tracking create a tracking I.D that you are going to use for just referrals. Best to keep this tracker separate from others for easier view of how effective it is.
So next you simply need to insert your tracker into the following sequence. This of course comes after the URL for hubpages which it won't let me post here.
Don't forget to put the underscore before your tracker. Then so you don't have to type it out all the time simply copy and paste into notepad and save.