Eberhard, David M.; Simons, Gary F.; Fennig, Charles D., eds. (2024). "Fur". Ethnologue: Languages of the World. Twenty-seventh edition. Dallas, Texas: SIL International.
glottolog.org
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Furan languages". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.