Classification
- WALS
- Tor > Central Wapei
- Glottolog
- Nuclear Torricelli > Au Olo Elkei > Olo Elkei
- Ethnologue
- Torricelli > Wapei Palei > Wapei
Sources
- McGregor and McGregor 1982
- Olo Language Materials. Pacific Linguistics: Series D, 42. Canberra: Australian National University.