Never claimed to be a Lawyer.
A AWB that contains maintenance data is "approved data" (Ref REG 2a it comes from CAsA).
If A AD says to referw to a AWB then you do but your certification for work will say AD/XXX/X carried out (not AWB carried out).
You will also not that as per the pervious post that I did The AD needs to be the document used as it is both a higher order and a later publication relating to the same instruction (you cant write an AD reference number if that publication does not yet exist).