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) ·

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

Atlas of the World’s Languages in Danger . Christopher Moseley (ed.) (2010) · UNESCO Publishing http://www.unesco.org/culture/en/endangeredlanguages/atlas

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

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

South Asia and the Middle East ( pp. 289-348 ch. 4 ) . George Van Driem (2007) · In Encyclopedia of the World's Endangered Languages edited by Christopher Mosely · London and NewYork: Routledge

Puroik phonology . {Remsangphuia} (2008) · Shillong: Don Bosco

The Sulung Tribe of the Assam Himalayas ( pp. 947-962 ) . C. R. Stonor (1952) · Anthropos. 47

Sulung Language Guide . Tayeng, Aduk (1990) · Directorate of Research, Government of Arunachal Pradesh

The Tibeto-Burman Languages of Northeastern India ( pp. 169-192 ) . Burling, Robbins (2003) · In The Sino-Tibetan Languages edited by Thurgood, Graham and LaPolla, Randy J. · London & New York: Routledge

A Grammar of Puroik . Lieberherr, Ismael. (forthcoming) · Brill

English-Puroik Dictionary . Rai Soja (2009) · Living Word Communicators http://www.rogerblench.info/ST%20scans/Recent/Puroik%20dictionary%20Soja%202009%20compressed.pdf

蘇龍語研究 A study of Sulung . Li, Daqin 李大勤 (2004) · The Ethnic Publishing House 民族出版社

Tibet's minority languages: Diversity and endangerment . Gerald Roche and Hiroyuki Suzuki (2017) · Modern Asian Studies. http://www.academia.edu/28138202/Tibets_Minority_Languages_Diversity_and_Endangerment