Cita APA (7th ed.)
Poulton, R. (1981). A history of the modern world. Oxford.
Cita Chicago (17th ed.)
Poulton, Richard. A History of the Modern World. London: Oxford, 1981.
Cita MLA (9th ed.)
Poulton, Richard. A History of the Modern World. Oxford, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.