Ikekeonwu, Clara I. 1991. Illustrations of the IPA: Igbo. Journal of the International Phonetic Association 21. 99–101. Cambridge University Press.
@article{ibo_ikekeonwu1991,
author = {Ikekeonwu, Clara I},
journal = {Journal of the International Phonetic Association},
number = {2},
pages = {99–101},
publisher = {Cambridge University Press},
title = {Illustrations of the IPA: Igbo},
volume = {21},
year = {1991}
}