Query to get the a/r receivables based on a cut-off date

I would like to ask assistance on how to create a query to display a/r receivables using a cut-off date. Example, today is 05/07/2014, I want to display  a/r posted from Jan. 1 2013 up to Dec. 31, 2013 that are still unpaid  as of April 30, 2014.