Cita APA

Martel, G. (1987). Origins of the First World War. Longman.

Citación estilo Chicago

Martel, Gordon. Origins of the First World War. London: Longman, 1987.

Cita MLA

Martel, Gordon. Origins of the First World War. Longman, 1987.

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