APA (7th ed.) Citation

Chadwick, O. (1964). The Reformation / by O. Chadwick. Penguin Books.

Chicago Style (17th ed.) Citation

Chadwick, Owen. The Reformation / by O. Chadwick. Penguin Books, 1964.

MLA (9th ed.) Citation

Chadwick, Owen. The Reformation / by O. Chadwick. Penguin Books, 1964.

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