Kurniawan S, Dwi, . Tarkono, and Harnowo Supriadi. 2013. “Utilization Of Fiber And Shell Particles Palm Oil As Substitute Materials In Producing Eternite Ceiling”. Jurnal Ilmiah Teknik Mesin 1 (3). http://journal.eng.unila.ac.id/index.php/fema/article/view/62.