@book { TheeffectofeducationalexpenditureoneconomicgrowthinNigeria,
    title = "The effect of educational expenditure on economic growth in Nigeria",
    author = "Paul {Ukonu}",
    year = "2021",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/1160434"
}