APA (7th ed.) Citation

Bunsen, C. K. J., Arndt, E. M., & Winkworth, S. (1856). Signs of the times: Letters to Ernst Moritz Arndt on the dangers of religious liberty in the present state of the world. Smith, Elder & co.

Chicago Style (17th ed.) Citation

Bunsen, Christian Karl Josias, Ernst Moritz Arndt, and Susanna Winkworth. Signs of the Times: Letters to Ernst Moritz Arndt on the Dangers of Religious Liberty in the Present State of the World. London: Smith, Elder & co, 1856.

MLA (9th ed.) Citation

Bunsen, Christian Karl Josias, et al. Signs of the Times: Letters to Ernst Moritz Arndt on the Dangers of Religious Liberty in the Present State of the World. Smith, Elder & co, 1856.

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