Good day, 

We have a system that uses a social network as a referall "engine"

The phone number will function as the unique identifier.
Based ot the above, in my client/prospect data, I would like to be able to see:

-Who was referer of one or more refered (one to multiple relationship) 

-And who was refered  by who (one to one relationship, because once someone has been refered, the tel number can no longer be accepted (is already registered) 

How would i go about this? 

Regards

Edwin