Roberts, J. M. (1976). The Hutchinson history of the world. Hutchinson.
Cita Chicago Style (17a ed.)Roberts, John Morris. The Hutchinson History of the World. London: Hutchinson, 1976.
Cita MLA (9a ed.)Roberts, John Morris. The Hutchinson History of the World. Hutchinson, 1976.
Precaución: Estas citas no son 100% exactas.