Choiruddin, I. “STUDI SENSOR PNEUMATIK PADA SISTEM PENGENDALIAN WELLHEAD”. Swara Patra : Majalah Ilmiah PPSDM Migas, vol. 2, no. 2, Dec. 2012, https://ejurnal.ppsdmmigas.esdm.go.id/sp/index.php/swarapatra/article/view/56.