APA (7th ed.) Citation

Clark, C. M. (2013). The sleepwalkers : how Europe went to war in 1914 / Christopher Clark: How Europe went to war in 1914. Penguin Books.

Chicago Style (17th ed.) Citation

Clark, Christopher M. The Sleepwalkers : How Europe Went to War in 1914 / Christopher Clark: How Europe Went to War in 1914. London: Penguin Books, 2013.

MLA (9th ed.) Citation

Clark, Christopher M. The Sleepwalkers : How Europe Went to War in 1914 / Christopher Clark: How Europe Went to War in 1914. Penguin Books, 2013.

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