APA (7th ed.) Citation

Roosevelt, F. D., & Roosevelt, E. (1949). The Roosevelt letters. Harrap.

Chicago Style (17th ed.) Citation

Roosevelt, Franklin D., and Elliott Roosevelt. The Roosevelt Letters. Lond.: Harrap, 1949.

MLA (8th ed.) Citation

Roosevelt, Franklin D., and Elliott Roosevelt. The Roosevelt Letters. Harrap, 1949.

Warning: These citations may not always be 100% accurate.