Andrie, Mohamad, Wintari Taurina, & Maya Widya Astuti Wulandari. " Stability Test of Ointment Protein Combination Snakehead Fish (Channa striata) and Ethanol Extract Leaves (Piper betle L.) Using Kjeldahl Method." JURNAL ILMU KEFARMASIAN INDONESIA [Online], 19.2 (2021): 147-153. Web. 5 Nov. 2024