Barraclough, G. (1967). An introduction to contemporary history. Penguin Books.
Cita Chicago Style (17a ed.)Barraclough, Geoffrey. An Introduction to Contemporary History. Middlessex: Penguin Books, 1967.
Cita MLA (9a ed.)Barraclough, Geoffrey. An Introduction to Contemporary History. Penguin Books, 1967.
Precaución: Estas citas no son 100% exactas.