@book { AladiMmainUmuohiagu,
    title = "Ala di Mma in Umuohiagu",
    author = "Gerald {Njoku}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03723-4",
    url = "https://www.peterlang.com/document/1048149"
}