Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

Endangered Languages in Central Africa ( pp. 163-178 ) . Bruce Connell (2007) · In Language Diversity Endangered edited by Matthias Brenzinger · Mouton de Gruyter

Lexique yaka-français, français-yaka ( pp. 280 ) . Ruttenberg, Piet (2000) · Languages of the world: dictionaries, #27 · Lincom Europa

Éléments de Grammaire Yaka: Phonologie et Morphologie Flexionelle . Karel van den Eynde (1968) · Publications de l'Université de Lovanium · Vol. 48 · Publications Universitaires, Université Lovanium