Ofili, Ugwudioha, Nile University of Nigeria
Okine, Abraham Nii Adu, Accra Institute of Technology
Oktavia, Reni, University of Lampung
Oktaviana, Dea , University of Bandar Lampung
Oktyawati, Dianila, Universitas Gadjah Mada
Olumoh, Yusuf Alabi, Kwara State University
Orekan, Atinuke, Bells University of Technology
Orekan, Atinuke Adibempe, Bells University of Technology
Oyasor, Emmanuel Imuede, Walter Sisulu University

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