Mangulu, Motingea. 1996. Étude comparative des langues Ngiri de l'entre Ubangi-Zaïre. Leiden: Research School of Asian, African and Amerindian Studies, Universiteit Leiden. (Doctoral dissertation, Rijksuniversiteit te Leiden; 292pp.)
@phdthesis{hvManguluNgiri, address = {Leiden}, author = {Mangulu, Motingea}, pages = {292}, publisher = {Leiden: Research School of Asian, African and Amerindian Studies, Universiteit Leiden}, school = {Rijksuniversiteit te Leiden}, title = {Étude comparative des langues Ngiri de l'entre Ubangi-Zaïre}, year = {1996} }