“PENGARUH SURFAKTAN PEG-7 GLYCERYL COCOATE-SPAN80 DAN PEG-40 HYDROGENATED CASTOR OIL-SPAN80 TERHADAP KARAKTERISTIK FISIK KRIM alfa-ARBUTIN”, JIFI, vol. 4, no. 1, pp. 158–167, Jun. 2021, doi: 10.36387/jifi.v4i1.624.