Thomas A. Carlson (ed.), "Urfa" in last modified January 14, 2014, http://syriaca.org/place/2402
    
        
            
                
                    Urfa
                    Urfa (patriarchal vicariate)
                    
          
                    http://syriaca.org/place/2402
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        65, 361, 362