Lubis, M. Y., L. Marpaung, M. P. Nasution, and P. Simanjuntak. “UJI FENOLIK DAN UJI TOKSISITAS EKSTRAK METANOL KULIT JENGKOL (Archidendron Jiringa)”. Chempublish Journal, vol. 1, no. 2, Nov. 2016, pp. 42-51, https://mail.online-journal.unja.ac.id/chp/article/view/3237.