• https://repository.unej.ac.id/items/794da350-f982-4034-a61c-92be7419eb63
• https://repository.unej.ac.id/items/95d80424-5cfd-4ece-b25c-41e9ada1603d
• https://repository.unej.ac.id/items/50285419-c080-4bed-b5b0-a90e05574926
• https://repository.unej.ac.id/items/53ce3581-b162-49e4-9b4e-e90f637cc96d