<https://jurnalsecurity.com/pusri-palembang-terima-kunjungan-terkait-penerapan-smpp/#article>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://jurnalsecurity.com/pusri-palembang-terima-kunjungan-terkait-penerapan-smpp/>