APA (7th ed.) Citation

United States. Army. Field Artillery, 18th, National World War I Museum at Liberty Memorial, & Adam Matthew Digital (Firm). The barrage. 18th Field Artillery.

Chicago Style (17th ed.) Citation

United States. Army. Field Artillery, 18th, National World War I Museum at Liberty Memorial, and Adam Matthew Digital (Firm). The Barrage. Polch, Germany: 18th Field Artillery.

MLA (9th ed.) Citation

United States. Army. Field Artillery, 18th, et al. The Barrage. 18th Field Artillery.

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