Hansson, Inga-Lill (2003). “Akha”. Trong Graham Thurgood and Randy J. LaPolla (biên tập). The Sino-Tibetan Languages. Routledge Language Family Series. London &New York: Routledge. tr. 236–252.
Lewis, Paul (1973). “Tone in the Akha language”. Anthropological Linguistics. 15 (4): 183–188. JSTOR30029534.
Nishida Tatsuo 西田 龍雄 (1966). アカ語の音素体系: タイ国北部における山地民アカ族の言語の記述的研究 [A Preliminary Report on the Akha Language ―A Language of a Hill Tribe in Northern Thailand]. 音声科学研究 Studia phonologica (bằng tiếng Japanese). 4 (1): 1–36.Quản lý CS1: ngôn ngữ không rõ (liên kết)
Danh sách từ cho các loại ngôn ngữ của Lào
Kingsadā, Thō̜ngphet, and Tadahiko Shintani. 1999. Basic Vocabularies of the Languages Spoken in Phongxaly, Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA).
Shintani, Tadahiko, Ryuichi Kosaka, and Takashi Kato. 2001. Linguistic Survey of Phongxaly, Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA).
Kato, Takashi. 2008. Linguistic Survey of Tibeto-Burman languages in Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA).
