APA Style

Keegan, John. (1999). The First World War . New York: Random House.

Chicago Style

Keegan, John. The First World War. New York: Random House, 1999. Text.

MLA Style

Keegan, John. The First World War. New York: Random House, 1999. Text.

Turabian Style

Keegan, John. The First World War. New York: Random House, 1999. Print.