Cook 1977

Cook, T. L. 1977. Efik. In Kropp Dakubu, M. E. (ed.), West African language data sheets, vol. 1. Legon, Ghana: West African Linguistic Society.

@misc{2177,
  author = {Cook, T. L.},
  title  = {Efik. In Kropp Dakubu, M. E. (ed.), West African language data sheets, vol. 1. Legon, Ghana: West African Linguistic Society.},
  year   = {1977}
}