Achebe, Chinua (1999). Tomorrow is Uncertain: Today is Soon Enough (Speech). Columbia University. Translated by Pritchett, Frances W. Owerri, Nigeria. Archived from the original on 25 December 2003. Retrieved 23 October 2022.
J. K., Macgregor (January–June 1909). "Some Notes on Nsibidi". Journal of the Royal Anthropological Institute. 39. Royal Anthropological Institute of Great Britain and Ireland: 209–219. doi:10.2307/2843292. JSTOR2843292.
Ohiri-Aniche, Chinyere (2007). "Stemming the tide of centrifugal forces in Igbo orthography". Dialectical Anthropology. 31 (4): 423–436. doi:10.1007/s10624-008-9037-x. S2CID144568449 – via Hollis.
Akere, Funso (1981). "Sociolinguistic consequences of language contact: English versus Nigerian Languages". Language Sciences. 3 (2): 283–304. doi:10.1016/S0388-0001(81)80003-4.
Emeka-Nwobia, Ngozi Ugo (2018). "Language Endangerment in Nigeria: The Resilience of Igbo Language". In Brunn, Stanley D; Kehrein, Roland (eds.). Handbook of the Changing World Language Map. Springer International. pp. 1–13. doi:10.1007/978-3-319-73400-2_33-1. ISBN978-3-319-73400-2. S2CID158553159.
J. K., Macgregor (January–June 1909). "Some Notes on Nsibidi". Journal of the Royal Anthropological Institute. 39. Royal Anthropological Institute of Great Britain and Ireland: 209–219. doi:10.2307/2843292. JSTOR2843292.
Ikekeonwu, Clara I. (Winter 1982). "Borrowings and Neologisms in Igbo". Anthropological Linguistics. 24 (4): 480–486. JSTOR30027647.
Goldsmith, John A. (June 1976). Autosegmental Phonology(PDF) (Ph.D. thesis). Massachusetts Institute of Technology. Archived from the original(PDF) on 22 March 2005.
Ohiri-Aniche, Chinyere (2007). "Stemming the tide of centrifugal forces in Igbo orthography". Dialectical Anthropology. 31 (4): 423–436. doi:10.1007/s10624-008-9037-x. S2CID144568449 – via Hollis.
Emeka-Nwobia, Ngozi Ugo (2018). "Language Endangerment in Nigeria: The Resilience of Igbo Language". In Brunn, Stanley D; Kehrein, Roland (eds.). Handbook of the Changing World Language Map. Springer International. pp. 1–13. doi:10.1007/978-3-319-73400-2_33-1. ISBN978-3-319-73400-2. S2CID158553159.
Achebe, Chinua (1999). Tomorrow is Uncertain: Today is Soon Enough (Speech). Columbia University. Translated by Pritchett, Frances W. Owerri, Nigeria. Archived from the original on 25 December 2003. Retrieved 23 October 2022.
Goldsmith, John A. (June 1976). Autosegmental Phonology(PDF) (Ph.D. thesis). Massachusetts Institute of Technology. Archived from the original(PDF) on 22 March 2005.
J. K., Macgregor (January–June 1909). "Some Notes on Nsibidi". Journal of the Royal Anthropological Institute. 39. Royal Anthropological Institute of Great Britain and Ireland: 209–219. doi:10.2307/2843292. JSTOR2843292.