APA (7th ed.) Citation

Helfferich, K. (1914). Germany's economic progress and national wealth, 1888-1913. Germanistic Society of America.

Chicago Style (17th ed.) Citation

Helfferich, Karl. Germany's Economic Progress and National Wealth, 1888-1913. New York: Germanistic Society of America, 1914.

MLA (9th ed.) Citation

Helfferich, Karl. Germany's Economic Progress and National Wealth, 1888-1913. Germanistic Society of America, 1914.