Cita APA (7th ed.)
Howard, M. (2007). The First World War: A very short introduction. Oxford University Press.
Cita Chicago (17th ed.)
Howard, Michael. The First World War: A Very Short Introduction. Oxford ; New York: Oxford University Press, 2007.
Cita MLA (9th ed.)
Howard, Michael. The First World War: A Very Short Introduction. Oxford University Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.