パーマネントリンク
https://update.library.uitm.edu.my/Record/Anastasia%20P.;%20Tarigan%20Z.J.H.;%20Siagian%20H.;%20Basana%20S.R.;%20Mohd%20T.
https://update.library.uitm.edu.my/Record/Anastasia%20P.;%20Tarigan%20Z.J.H.;%20Siagian%20H.;%20Basana%20S.R.;%20Mohd%20T.