URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/stability-comparison-of-conventional-and-foam-mat-red-and-purple-dried-roselle-calyces-powder-as-a-function-of-ph-dcfcd07e645d245babe887e5e2daa016/312f523d-2570-11f0-ae8a-e4434b0aa6de