WINGS, BFR, and Log entries

What's necessary in a logbook to indicate that a WINGS level completion is
serving in place of a BFR? AC 61-91H merely mentions in (6) that the
completion serves in place of a BFR, and in (9) mentions "...logbooks or
other proficincy records...". At various WINGS-fulfilling events, a form
is handed out indicating completion of the ground portion which contains
space for entries of the air portions. I'd my instructor complete this
form. This is what I sent in to the FAA.

They sent a pin and a nice certificate. But what should be in my logbook
indicating that I'm current?

- Andrew