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{2485,
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}
}