Kalu, O. (1978). Christianity in West Africa: The Nigerian story. Daystar Press.
Cita Chicago (17th ed.)Kalu, Ogbu. Christianity in West Africa: The Nigerian Story. Ibadan: Daystar Press, 1978.
Cita MLA (8th ed.)Kalu, Ogbu. Christianity in West Africa: The Nigerian Story. Daystar Press, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.