APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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