Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, biên tập (2013). "Dakota". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, biên tập (2013). "Lakota". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.