<https://secure.gravatar.com/avatar/1a66c7b110d090abbc5589779fdf9e0d?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://peternakrakyat.com/aplikasi-terbaik-untuk-mengelola-jejaring-sosial-bisnis-kecil/>