URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/developing-a-circular-economy-index-to-measure-the-macro-level-of-circular-economy-implementation-in-indonesia-dcfcd07e645d245babe887e5e2daa016/11482124-34d4-11ee-a28c-e4434b0aade8