Referral program on Wordpess, how can it be implemented?

Question

Online shopping

There is a task to implement a referral program for landing.
There is a landing page for the sale of regular products of the Chinese industry.
Need the ability to create unique ref. links for "partners" and convenient tracking of these links.
A referral is considered successfully attracted if he is on ref. link went to the landing page and left his data in the contact form.
Maybe someone has already implemented something similar on the available components?

Answer 1

Plugin Referal-Recall - organization of affiliate pro...
WordPress Referral Lite
Partners System - flexible multi-level affiliate...