Bradbury, R. E. (1964). The Benin kingdom and the Edo-speaking peoples of south-western Nigeria; the Benin kingdom; the Ishan; the northern Edo; the urhobo and Isoko of the Niger delta, together with a section of the Itsekiri by P.C. Lloyd. International African Institute.
Chicago-referens (17:e uppl.)Bradbury, R. E. The Benin Kingdom and the Edo-speaking Peoples of South-western Nigeria; the Benin Kingdom; the Ishan; the Northern Edo; the Urhobo and Isoko of the Niger Delta, Together with a Section of the Itsekiri by P.C. Lloyd. London: International African Institute, 1964.
MLA-referens (9:e uppl.)Bradbury, R. E. The Benin Kingdom and the Edo-speaking Peoples of South-western Nigeria; the Benin Kingdom; the Ishan; the Northern Edo; the Urhobo and Isoko of the Niger Delta, Together with a Section of the Itsekiri by P.C. Lloyd. International African Institute, 1964.