APA (7th ed.) Citation

MacCulloch, D. (2010). A history of Christianity: The first three thousand years. Penguin.

Chicago Style (17th ed.) Citation

MacCulloch, Diarmaid. A History of Christianity: The First Three Thousand Years. London: Penguin, 2010.

MLA (9th ed.) Citation

MacCulloch, Diarmaid. A History of Christianity: The First Three Thousand Years. Penguin, 2010.

Warning: These citations may not always be 100% accurate.