APA (7th ed.) Citation

Atkinson, J. (1968). Martin Luther and the birth of Protestantism. Penguin Books.

Chicago Style (17th ed.) Citation

Atkinson, James. Martin Luther and the Birth of Protestantism. Baltimore: Penguin Books, 1968.

MLA (9th ed.) Citation

Atkinson, James. Martin Luther and the Birth of Protestantism. Penguin Books, 1968.

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