APA (7th ed.) Citation

Roosevelt, T. (1917). National strength and international duty. Princeton university press; [etc., etc.].

Chicago Style (17th ed.) Citation

Roosevelt, Theodore. National Strength and International Duty. Princeton: Princeton university press; [etc., etc.], 1917.

MLA (9th ed.) Citation

Roosevelt, Theodore. National Strength and International Duty. Princeton university press; [etc., etc.], 1917.