staff.uny.ac.idstaff.uny.ac.id/sites/default/files/lain-lain/pujianto-mpd/jurnal... · drs. yusmin...
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- staff.uny.ac.idstaff.uny.ac.id/sites/default/files/lain-lain/pujianto-mpd/jurnal... · Drs. Yusmin Siahaan, M.Si. (STKIP Riama) Drs. M. Ayyub Lubis, M.Pd. (Univ. Muslim Nusantara
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