APA (7th ed.) Citation

Röhl, J. C. G. (1991). 1914: Delusion or design? The outbreak of World War I.

Chicago Style (17th ed.) Citation

Röhl, John C. G. "1914: Delusion or Design?" The Outbreak of World War I 1991.

MLA (8th ed.) Citation

Röhl, John C. G. "1914: Delusion or Design?" The Outbreak of World War I, 1991.