<https://www.bhataramedia.com/4928/guru-besar-ugm-banyak-negara-melakukan-despesialisasi/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.bhataramedia.com/4928/guru-besar-ugm-banyak-negara-melakukan-despesialisasi/>