• https://repository.unilak.ac.id/items/e25cf0d5-1d30-4eaf-8a83-229fd34718e4
• https://repository.unilak.ac.id/items/34a32a43-4f9b-4523-b176-f507e00423b5
• https://repository.unilak.ac.id/items/dc6f39c1-8798-48e2-ab5a-909df749e669
• https://repository.unilak.ac.id/items/7e3e1ea6-b9df-4c0a-bd85-454603b163ad
• https://repository.unilak.ac.id/items/bdafddeb-6c02-42b7-939f-a9b9f639d89c
• https://repository.unilak.ac.id/items/b5e86310-65ca-4744-956f-5c2eb4b0c1c4
• https://repository.unilak.ac.id/items/bb1a4ad1-4583-4d50-9380-f693c0212531