Mustain, M.
(2011).
 SIDOARJO MUD PHENOMENON AS A PERMANENT MUD-VULCANO  FOR PRELIMINARY HYPHOTHESIS.
<em>Bumi Lestari Journal Of Environment, 11</em>(2).
Diambil dari <a href="https://ojs.unud.ac.id/index.php/blje/article/view/150" target="_new">https://ojs.unud.ac.id/index.php/blje/article/view/150</a>