Ugwu Elias Ikechukwu ,  Reciprocal Interferences in Bilingual English-Igbo Speaking Society: The Implications in Language Pedagogy.   journal   = {International Journal of Cognitive and Language Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 3085 - 3089
    [viewed 15 April 2021]. Available from: https://publications.waset.org/pdf/9996724.