<http://museummusikindonesia.id/en/category/majalah-aktuil-tahun-1969/edisi-031/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://museummusikindonesia.id/en/2020/08/08/aktuil-edisi-031-th-1969/amp/>