Snooks, G. D. (1998). The laws of history. Routledge.
Cita Chicago (17th ed.)Snooks, G. D. The Laws of History. London ; New York: Routledge, 1998.
Cita MLA (9th ed.)Snooks, G. D. The Laws of History. Routledge, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.