APA (7th ed.) Citation

Webster, H. (1920). Modern European history. D. C. Heath & Co..

Chicago Style (17th ed.) Citation

Webster, Hutton. Modern European History. Boston ; New York, [etc]: D. C. Heath & Co., 1920.

MLA (8th ed.) Citation

Webster, Hutton. Modern European History. D. C. Heath & Co., 1920.