APA (7th ed.) Citation

Hazen, C. D. (1917). Modern European history. H. Holt and Co.

Chicago Style (17th ed.) Citation

Hazen, Charles Downer. Modern European History. New York: H. Holt and Co, 1917.

MLA (9th ed.) Citation

Hazen, Charles Downer. Modern European History. H. Holt and Co, 1917.