Unusual reference style needed

Is it possible to create a style like this?

In the text, we use regular APA 6th format  (AuthorA, 2010; Author B,2010)

But then we add an endnote to it: (AuthorA, 2010; Author B,2010)1

And in the reference section we group the references in this set together into the endnote, using APA format

1AuthorA (2010)……; Author B (2010)……