SURYA, alfin. ACTIVITIES ANTIOXIDE EXTRACT LEATHER LEATHER (Pithecellobium jiringa) WITH THREE DIFFERENT LEVELS OF POLLARS. JURNAL REKAYASA SISTEM INDUSTRI, [S.l.], v. 3, n. 1, p. 88-96, dec. 2017. ISSN 2621-1262. Available at: <http://ejournal.upbatam.ac.id/index.php/rsi/article/view/189>. Date accessed: 18 oct. 2018.