* Shryock, A., Ladefoged, P., & Williamson, K. (1996/97) 'The phonetic structures of Defaka', "Journal of West African Languages", 26, 2, 3–27.
* Shryock, A., Ladefoged, P., & Williamson, K. (1996/97) 'The phonetic structures of Defaka', "Journal of West African Languages", 26, 2, 3—27.