APA (7th ed.) Citation

U. S. soldiers arriving on the Mexican border. Kavanaugh's War Postals.

Chicago Style (17th ed.) Citation

U. S. Soldiers Arriving on the Mexican Border. Kavanaugh's War Postals.

MLA (8th ed.) Citation

U. S. Soldiers Arriving on the Mexican Border. Kavanaugh's War Postals.

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