Freeman, Christopher. (1983). Long waves in the world economy. Butterworths.
Cita Chicago Style (17a ed.)Freeman, Christopher. Long Waves in the World Economy. London: Butterworths, 1983.
Cita MLA (9a ed.)Freeman, Christopher. Long Waves in the World Economy. Butterworths, 1983.
Precaución: Estas citas no son 100% exactas.