Risdiyanta, Risdiyanta. 2012. “KAJIAN KEEKONOMIAN DESAIN SEPARATOR SURFACE FACILITIES PADA LAPANGAN X”. Swara Patra : Majalah Ilmiah PPSDM Migas 2 (1). http://ejurnal.ppsdmmigas.esdm.go.id/sp/index.php/swarapatra/article/view/38.