APA (7th ed.) Citation

Thomas, H. C., & Hamm, W. A. (1934). Modern Europe. H. Holt and Co.

Chicago Style (17th ed.) Citation

Thomas, Harrison Cook, and William Albert Hamm. Modern Europe. New York: H. Holt and Co, 1934.

MLA (8th ed.) Citation

Thomas, Harrison Cook, and William Albert Hamm. Modern Europe. H. Holt and Co, 1934.