ヴァン・ドリーム,ジョージ(2001).Languages of the Himalayas: An Ethnolinguistic Handbook of the Greater Himalayan Region: Containing an Introduction to the Symbiotic Theory of Language.Brill.pp.1412.ISBN90-04-12062-9
ヴァン・ドリーム,ジョージ(2007).“Endangerd Languages of Bhutan and Sikkim: East Bodish Languages”.InMoseley, Christopher.Encyclopedia of the World's Endangered Languages.Routledge.pp.295, 331.ISBN0-7007-1197-X
Namgyel,Singye.The Language Web of Bhutan.Thimphu:KMT
ヴァン・ドリーム,ジョージ;Karma Tshering of Gaselô (collab)(1998).Dzongkha.Languages of the Greater Himalayan Region.Leiden:Research School CNWS, School of Asian, African, and Amerindian Studies.ISBN90-5789-002-X