Piluharto, Bambang, 		Syafi’i, Imam, 		Indahsari, R., AND 		Haryati, Tanti.
" CHARACTERIZATION OF SULFONATED POLYSULFONE/BENTONITE HYBRID MEMBRANES" <em>Jurnal ILMU DASAR</em> [Online], Volume 13 Number 1 (3 January 2012)