↑ "Glossolalia n." A Dictionary of Psychology. Edited by Andrew M. Colman. Oxford University Press 2009. Oxford Reference Online. 2011.
↑ R. F. G. Adams (1947) Obεri Ɔkaimε: A new African language and script. In Africa: Journal of the International African Institute, 17 : 24-34. Lưu trữ Jstor.
↑ Akpan Akpan Udofia (1953), "Dictionary, transcriptions and translations of texts", in: Hau, Kathleen (1953), Oberi Okaime Script, Texts and Counting System. Material relating to the Oberi Okaime language of southeastern Nigeria.
