パーマネントリンク
https://update.library.uitm.edu.my/Record/Chijioke-Okere%20M.O.;%20Adlan%20Mohd%20Hir%20Z.;%20Ogukwe%20C.E.;%20Njoku%20P.C.;%20Abdullah%20A.H.;%20Oguzie%20E.E.
https://update.library.uitm.edu.my/Record/Chijioke-Okere%20M.O.;%20Adlan%20Mohd%20Hir%20Z.;%20Ogukwe%20C.E.;%20Njoku%20P.C.;%20Abdullah%20A.H.;%20Oguzie%20E.E.