Thomas A. Carlson (ed.), "Yardā" in last modified January 14, 2014, http://syriaca.org/place/1815
    
        
            
                
                    Yardā
                    
                    
                        Goyan district
                        Gāzartā region
                    
          
                    http://syriaca.org/place/1815
                    
                        David Wilmshurst
                        The Ecclesiastical Organisation of the Church of the East, 1318-1913
                        108, 109, 111, 121, 122