APA (7th ed.) Citation

(1952). Letter, Ridgway to Smith, February 2, 1952, Top Secret.

Chicago Style (17th ed.) Citation

Letter, Ridgway to Smith, February 2, 1952, Top Secret. 1952.

MLA (8th ed.) Citation

Letter, Ridgway to Smith, February 2, 1952, Top Secret. 1952.

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