URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/development-of-willingness-to-pay-questionnaire-on-health-insurance-cost-sharing-for-catastrophic-prescription-drugs--a-content-validity-and-dcfcd07e645d245babe887e5e2daa016/110c7e9e-345b-11ef-ae9c-e4434b0aa6de
