Robert Okonigene
发表
Robert Okonigene,
Godwin Ighalo,
Emmanuel Ogbeifun,
2008,
FECS.
Robert Okonigene,
Samuel Ndueso John,
Adebiyi Adelakun,
2010,
MSV.
Robert Okonigene,
Isimhemen Oborkhale,
2009,
Security and Management.