URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/optimization-of-ultrasound-assisted-cold-brew-method-for-developing-roselle--hibiscus-sabdariffa-l---based-tisane-with-high-antioxidant-acti-dcfcd07e645d245babe887e5e2daa016/b788f780-719d-11f0-ae8a-e4434b0aa6de
