APA (7th ed.) Citation

Gibbs, S. P. H. (1917). The battles of the Somme. Heinemann.

Chicago Style (17th ed.) Citation

Gibbs, Sir Philip Hamilton. The Battles of the Somme. London: Heinemann, 1917.

MLA (9th ed.) Citation

Gibbs, Sir Philip Hamilton. The Battles of the Somme. Heinemann, 1917.