Cita APA

Martel, G. (1996). Origins of the first world war (2 v.). Longman.

Chicago Edition Citation

Martel, Gordon. Origins of the First World War. 2 v. Newyork: Longman, 1996.

Cita MLA

Martel, Gordon. Origins of the First World War. 2 v. Longman, 1996.