A preliminary assessment of Ndoola (Ndoro) . Bruce Connell and Roger Blench (2014) · http://www.rogerblench.info/Language/Niger-Congo//Bantoid/Mambiloid/Ndoro/Ndoola%20wordlist.pdf

An Atlas of Nigerian Languages ( pp. 111 ) . Roger Blench (2012) · http://www.rogerblench.info/Language/Africa/Nigeria/Atlas%20of%20Nigerian%20Languages-%20ed%20III.pdf

Glottolog 2.3 . Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian (2014) · http://glottolog.org