Williamson, Kay (1989) 'Niger–Congo overview', in Bendor-Samuel & Hartell (eds.) The Niger–Congo Languages, 3–45.
Retroflex consonant | Fricative consonant | consonant | click consonant | Labiodental nasal | coronal consonant | Tenuis consonant | stop consonant | Nasal voice | nasal spray | Nasal scale | Nasal irrigation | Nasal congestion | nasal congestion | High German consonant shift | Glottal consonant | Dorsal consonant | Coronal consonant | Click consonant | Afrin (nasal spray) |