Ethnologue: Languages of the World, 16th Edition (2009) . (2009) · edited by M. Paul Lewis · SIL International http://www.ethnologue.com/

World Oral Literature Project . http://www.oralliterature.org

Encyclopedia of the World's Endangered Languages . Christopher Moseley (2007) · Routledge

The Laru people and their language . Roger Blench (2006) · http://www.docstoc.com/docs/24854708/THE-LARU-PEOPLE-AND-THEIR-LANGUAGE-Roger-Blench-Mallam-Dendo-8

Research and development of Nigerian minority languages ( ch. 1 ) . Roger Blench (2012) · In Advances in Minority Language Research in Nigeria vol. I edited by Roger Blench and Stuart McGill · Rüdiger Köppe Verlag

Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·