MLA

Gilbert, Martin. The Routledge Atlas of the First World War. 2e ed. London: Routledge, 2002.

APA

Gilbert, M. (2002). The Routledge atlas of the First World War. 2e ed. London: Routledge.

Chicago

Gilbert, Martin, The Routledge Atlas of the First World War. 2e ed. London: Routledge, 2002.