The sleepwalkers

MLA

Clark, Christopher M. The Sleepwalkers : How Europe Went to War In 1914. 1st US ed. New York, NY: HarperCollins, 2013.

APA

Clark, C. M. (2013). The sleepwalkers : how Europe went to war in 1914. 1st US ed. New York, NY: HarperCollins.

Chicago

Clark, Christopher M. The Sleepwalkers: How Europe Went to War In 1914. 1st US ed. New York, NY: HarperCollins, 2013.