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)……