<http://schema.org/item>
<https://id.scribd.com/browse/Types/School-Work/Homework>
<https://id.scribd.com/document/48620772/Permendiknas-Nomor-59-Tahun-2008-Tentang-Pengesahan-Fotokopi-Dan-Surat-Keterangan-Pengganti-Ijazah>