<https://www.tugasku.net/2014/06/contoh-laporan-kegiatan-o2sn-dan-fls2n.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.tugasku.net/2014/06/contoh-laporan-kegiatan-o2sn-dan-fls2n.html>