Classification
- WALS
- TNG > Ok
- Glottolog
- Nuclear Trans New Guinea > Asmat Awyu Ok > Awyu Ok > Ok Oksapmin > Ok > Mountainok
- Ethnologue
- Trans Newguinea > Ok Awyu > Ok > Mountain
Sources
- Healey and Healey 1977
- Telefol dictionary. Canberra: Australian National University.