@book { NigerianVaticanDiplomaticRelations,
    title = "Nigerian-Vatican Diplomatic Relations",
    subtitle = "Evangelisation and Catholic Missionary Enterprise 1884-1950",
    author = "Blaise {Okpanachi}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02965-9",
    url = "https://www.peterlang.com/document/1046445"
}