Andrie, M., 		Taurina, W., & 		Wulandari, M.
(2021).
 Stability Test of Ointment Protein Combination Snakehead Fish (Channa striata) and Ethanol Extract Leaves (Piper betle L.) Using Kjeldahl Method.
<em>JURNAL ILMU KEFARMASIAN INDONESIA, 19</em>(2), 147-153.
doi:10.35814/jifi.v19i2.799