Catholic Encyclopedia: Nathan - Commentary on the Biblical prophet from the traditional Catholic perspective. - http://www.newadvent.org/cathen/10711a.htm
Nathan The Prophet - Biblical biography of King David's spiritual advisor. - http://www.execulink.com/~wblank/20010729.htm
Jewish Encyclopedia: Nathan - Overview of the prophet and advisor of David from the traditional Jewish perspective. - http://www.jewishencyclopedia.com/view.jsp?artid=90&letter=N