Classification
- WALS
- TK > Kam Tai
- Glottolog
- Tai Kadai > Kam Tai > Daic Beic > Daic > Northerndaic Sek > Northerndaic
- Ethnologue
- Kra Dai > Kam Tai > Tai > Central
Sources
- Oshika 1973
- The relationship of Kam-Sui-Mak to Tai. Ph.D. dissertation, University of Michigan.