↑ Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert và đồng nghiệp biên tập (2013). “Cua”. Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology. Gợi ý |số biên tập viên= (trợ giúp)
↑ Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Cua". Glottolog 3.1. Jena, Germany: Max Planck Institute for the Science of Human History. Truy cập 12/12/2017.
↑ Maier, Jacqueline G. and Eva Burton, compilers. 1966. Cua (Kool) dictionary. [Manuscript] n.p.
↑ Sidwell, Paul. 2010. Cua (Kor) historical phonology and classification. Mon-Khmer Studies 39, p. 105-122.
↑ Sidwell, Paul. 2009. How many branches in a tree? Cua and East (North) Bahnaric. In Evans, Bethwyn (ed). Discovering History Through Language: Papers in Honour of Malcolm Ross. Canberra: Pacific Linguistics.
