Buchanan, M. (2001). Ubiquity: The science of history or why the world is simpler than we think. Phoenix.
Cita Chicago Style (17a ed.)Buchanan, Mark. Ubiquity: The Science of History or Why the World Is Simpler than We Think. London: Phoenix, 2001.
Cita MLA (9a ed.)Buchanan, Mark. Ubiquity: The Science of History or Why the World Is Simpler than We Think. Phoenix, 2001.
Precaución: Estas citas no son 100% exactas.