APA (7th ed.) Citation

Keegan, J. (1999). The First World War / John Keegan. Pimlico.

Chicago Style (17th ed.) Citation

Keegan, John. The First World War / John Keegan. London: Pimlico, 1999.

MLA (9th ed.) Citation

Keegan, John. The First World War / John Keegan. Pimlico, 1999.

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