?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=RYU&rft.au=RYU+EKA+AHMAD+AKMAL%2C+RYU&rft.aulast=RYU+EKA+AHMAD+AKMAL&rft.inst=Universitas+Muhammadiyah+Prof.+DR.+Hamka&rft.degree=Bachelor&rft.title=SKRIPSI-2010015003-RYU+EKA+AHMAD+AKMAL&rft.date=2024