Handayani, R. “Uji Daya Hambat Ekstrak Metanol Dan Fraksi Rimpang Lengkuas Merah (Alipinia Purpuruta K Schoum) Terhadap Bakteri Escherichia Coli: Inhibition Test of Methanol Extract and Red Galangal Rhizome Fraction (Alipinia Purpuruta K Schoum) Against Escherichia Coli Bacteria”. Jurnal Surya Medika (JSM), vol. 1, no. 2, Feb. 2016, pp. 1-9, doi:10.33084/jsm.v1i2.393.