Greenberg, Joseph Harold. 1941. Some Problems in Hausa Phonology. Language 17. 316–323.
@article{greenberg1941,
author = {Greenberg, Joseph Harold},
journal = {Language},
number = {4},
pages = {316–323},
title = {Some Problems in Hausa Phonology},
volume = {17},
year = {1941}
}