HARTINI, YUSTINA, WAHYUONO, SUBAGUS, WIDYARINI, SITARINA, AND YUSWANTO, AGUSTINUS. " Phagocytic Macrophage Activity of Fractions from Methanolic Leaf Extract of Red Betel (Piper crocatum Ruiz & Pav.) In Vitro" JURNAL ILMU KEFARMASIAN INDONESIA [Online], Volume 11 Number 2 (30 September 2013)