URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/what-do-we-know-about-the-forced-distribution-system--a-systematic-literature-review-and-opportunities-for-future-research-dcfcd07e645d245babe887e5e2daa016/d69be9fb-32b2-11f0-ae8a-e4434b0aa6de