This is a question with a very simple answer I am sure.

In making reference to a recordsource and the controlsource I'm stumped on how to make refence to the controlsource once I've moved up the chain. For example

THIS.PARENT.PARENT.RECORDSOURCE
THIS.PARENT.CONTROLSOURCE

THIS.PARENT.RECORDSOURCE
THIS.CONTROLSOURCE

This is where I want to be
THIS.RECORDSOURCE
How do I reference the controlsource at this level?