"Amami-Okinawan". SIL International. Dicapai pada 1 February 2014.
glottolog.org
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, penyunting (2017). "Northern Ryukyuan". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.