APA (7th ed.) Citation

(1946). Letter, Lewis to Helms, October 8, 1946, Top Secret.

Chicago Style (17th ed.) Citation

Letter, Lewis to Helms, October 8, 1946, Top Secret. 1946.

MLA (8th ed.) Citation

Letter, Lewis to Helms, October 8, 1946, Top Secret. 1946.

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