APA (7th ed.) Citation

Citrine, W. Letter (copy): Transport of war materials to Spanish rebels.

Chicago Style (17th ed.) Citation

Citrine, Walter. Letter (copy): Transport of War Materials to Spanish Rebels.

MLA (8th ed.) Citation

Citrine, Walter. Letter (copy): Transport of War Materials to Spanish Rebels.

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