APA (7th ed.) Citation

Falls, C., & Laurie, G. B. The history of the first seven battalions, the Royal Irish Rifles (now the Royal Ulster Rifles) in the Great War.

Chicago Style (17th ed.) Citation

Falls, Cyril, and G. B. Laurie. The History of the First Seven Battalions, the Royal Irish Rifles (now the Royal Ulster Rifles) in the Great War.

MLA (9th ed.) Citation

Falls, Cyril, and G. B. Laurie. The History of the First Seven Battalions, the Royal Irish Rifles (now the Royal Ulster Rifles) in the Great War.