How to use acts_as_versioned_association


I have been looking for documentation for acts_as_versioned_association
and can’t really find any. I have acts_as_versioned_working properly but
want to change to acts_as_versioned_association. Do I need to create a
3rd table to use as a reference or is it all done behind the scenes and
all I need to do is add the plug-in and:

acts_as_versioned_association : Reference
acts_as_versioned_association : Reference

I tried to just add the above and can’t get it to work. Does anyone know
what I am missing or know where I can find more documentation about it?

Thanks for the help.