http://archives.sealang.net/mahidol (Publisher version)
Panadda, B. (1994). A phonological study of Akha in Pa-Kha-Suk-Jai village, Tambol Mae-Sa-Long-Nok, King Amphur Mae-Fa-Luang, Chiang Rai Province. Master Thesis, Univ., Nakhon Pathom.