| Robinson, Clinton D. W | Language use and language attitudes: Communicating rural development in Africa | 1991 | British Studies in Applied Linguistics | Sociolinguistics |
| Patman, Frankie | Tone in the Nugunu verb phrase | 1991 | SIL International Publications in Linguistics | Linguistics |
| Anderson, Stephen C., editor | Tone in five languages of Cameroon | 1991 | SIL International Publications in Linguistics | Linguistics |
| Orwig, Carol J | Relative time reference in Nugunu | 1991 | SIL International Publications in Linguistics | Linguistics |
| Patman, Frankie | Tone in the Nugunu verb phrase | 1991 | | Linguistics |
| Comité de langue gunu (GULICO) | Nciŋí sá babaaba: Ncaba sá bégunu | 1991 | | |
