Strecker, David (1987). "The Hmong-Mien Languages"(PDF). Linguistics of the Tibeto-Burman Area. 10 (2): 1–11. Archived from the original(PDF) on 2015-06-16.
Strecker, David (1987). "The Hmong-Mien Languages"(PDF). Linguistics of the Tibeto-Burman Area. 10 (2): 1–11. Archived from the original(PDF) on 2015-06-16.