1. Anagbogu, P.N. (2005). Pluralization in Koring. Awka Journal of Linguistics and Languages, 1, 132-140.
2. Arokoyo, B. E. (2017). Unlocking morphology(2nded.). Chrimadel Publishing House.Aronoff, M. (1976). Word formation in generative grammar.MIT Press.
3. Barnwell, K. (1969). The noun class system inMbembe. The Journal of West African Languages,6(1), 51-58.Bauer, L. (2003). Introducing linguistic morphology(2nded.). Edinburgh University Press.
4. Blench, R. M. & Kaze, B. (2019). A dictionary of the Izere language of Fobur. http://www.rogerblench.info/RBOP.htm
5. Blench, R. M. (2004). The Benue-Congo languages: A proposed internal classification. http://homepage.ntlworld.com/roger_blench/RBOP.htmBlench, R. M. (2015). Number marking in Mada nouns. http://www.rogerblench.info/RBOP.htm
6. Blench, R.M. (2000). Transitions in Izere nominal morphology and implications for the analysis of Plateau languages. In A. Meißner & A. Storch (Eds.) Nominal classification in African languages,12(pp. 7-28). Afrikanische Blätter.
7. Bodomo, A. B. & Marfo, C. O. (2002). The morphophonology of noun classes in Dagaare and Akan. Studi Linguistici e Filologici Online,4(2), 205-243.
8. Crozier, D. H. & Blench, R. M. (1992).Index of Nigerian languages (2nded.). Nigerian Educational Research and Development Council.
9. Eberhard, D. M., Simons, G. F. & Fennig, C. D. (Eds.) (2019). Ethnologue: Languages of the world.(22ndedn.). SIL International.http://www.ethnologue.comEjele, P.E. (1997). The expression of plurality in Esan. Nigerian Language Studies, 5, 62-67.
10. Greenberg, J. H. (1963). The languages of Africa. Indiana University Press.
11. Gunn, H. D. (1953). The Afizere (hill Jarawa) and related peoples of Bauchi province. In F. Daryl (Ed.)Peoples of the Plateau area of northern Nigeria: Ethnographic survey of Africa:western Africa,8(pp. 60-74). International African Institute.
12. Haspelmath, M. & Sims, A. D. (2010). Understanding morphology(2nded.). Hodder Education.
13. Haspelmath, M. (2002). Understanding morphology. Oxford University Press.Hockett, C. F. (1954). Two models of grammatical description. Word,10, 210-231.
14. Hyman, L. M. (2007). Tone: Is it different? In J. Goldsmith, J. Riggle & A. Yu (Eds.).The handbook of phonological theory(2nded.)(pp. 483-528). BlackwellPublishers.
15. Isha, V. I. N. & Haruna, A. (2016). The syllable structure of Izere. In O. M. Ndimele,M. Ahmad, & H. M. Yakasai (Eds.). Language, literature and culture in a multilingual society, 2(pp. 753-762). M and J Grand Orbit Communications.
16. Isha, V. I. N. (2010). Inflectional morphology: A study of grammatical categories in Izere. Journal of Nigerian Languages and Culture, 12(2), 197-204.
17. Lieber, R. (2009). Introducing morphology. Cambridge University Press.Lieber, R. (1980). On the organization of the lexicon. PhD thesis,Massachusetts Institute of Technology.
18. Nida, A. E. (1949). Morphology: The descriptive analysis of words. The University of Michigan Press.
19. Nkamigbo, L. C. (2011). The expression of nominal plurality in Eggon. UJAH: Unizik Journal of Arts and Humanities,154-160.
20. Nkamigbo, L. C. (2009). Lexical pluralization in Jaba. Journal of the Linguistic Association of Nigeria,12, 205-213.
21. Omachonu, G.S. (2008). Inflectional morphology in Igala. Journal of the Linguistic Association ofNigeria, 11, 33-40.
22. Trask, R. L. (1993). A dictionary of grammatical terms in linguistics.RoutledgePublishers.Welmers, W. (1973). African language structures. University of California Press.
23. Yusuf, S. (2017).Inflection in Igala (Unpublished master’s thesis).Bayero University, Kano.