Cohen, M. R. (1961). The meaning of human history (2nd.ed.). Open Court.
Cita Chicago Style (17a ed.)Cohen, Morris R. The Meaning of Human History. 2nd.ed. Illinois: Open Court, 1961.
Cita MLA (9a ed.)Cohen, Morris R. The Meaning of Human History. 2nd.ed. Open Court, 1961.
Precaución: Estas citas no son 100% exactas.