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) ·

South Asia and the Middle East ( pp. 283-348 ) . George van Driem (2007) · In Encyclopedia of the World's Endangered Languages edited by Christopher Moseley · London & New York: Routledge

The World Atlas of Language Structures . (2005) · edited by Bernard Comrie and David Gil and Martin Haspelmath and Matthew S. Dryer · Oxford University Press

An outline grammar of the Lhōtā Nāgā Language . W. E. Witter (1888) · Calcutta: Superintendent of Government Printing

Lotha grammar . Acharya, K. P. (1983) · Central Institute of Indian Languages, Grammar Series · Vol. 10 · Central Institute of Indian Languages