Elugbe, Ben (10 December 2008). "Nigerian Pidgin English: phonology". In Mesthrie, Rajend; Kortmann, Bernd; Schneider, Edgar W. (eds.). 4 Africa, South and Southeast Asia. Varieties of English. Berlin, New York: De Gruyter Mouton. pp. 55–66. ISBN978-3-11-020842-9. Retrieved 26 October 2023.