APA (7th ed.) Citation

Schroeder, P. W. (1919). World War I as galloping gertie. The outbreak of World War I.

Chicago Style (17th ed.) Citation

Schroeder, Paul W. "World War I as Galloping Gertie." The Outbreak of World War I 1919.

MLA (8th ed.) Citation

Schroeder, Paul W. "World War I as Galloping Gertie." The Outbreak of World War I, 1919.

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