APA (7th ed.) Citation

Gilbert, M. (1994). The First World War: A complete history. Holt.

Chicago Style (17th ed.) Citation

Gilbert, Martin. The First World War: A Complete History. New York, N.Y: Holt, 1994.

MLA (8th ed.) Citation

Gilbert, Martin. The First World War: A Complete History. Holt, 1994.