Kaye, Alan S. 1991. "Nilo-Saharan Influence On Ki-Nubi." In Proceedings of the 3rd Nilo-Saharan linguistics colloquium, Kisumu, Kenya, August 4-9, 1986, edited by Franz Rottland and Lucia Ndong’a Omondi. 124-129. Rüdiger Köppe Verlag.
Kaufman, Elaine [Marlowe]. 1985. "Ibibio Dictionary." xvi, 617. African Studies Centre (ASC); Cross River State Univ.; Ibibio Language Board.