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). “Endangered Languages of Bhutan and Sikkim: East Bodish Languages”. In Moseley, Christopher. Encyclopedia of the World's Endangered Languages. Routledge. p. 295. 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