Roberts, J.M. The penguin history of the world / J.M. Roberts and O. A. Westad - 6th ed. - New Delhi : Penguin Books, c2013. - 1260p. ; ill. ; 22 cm. ISBN: 9781846144431 LCCN: Subjects--Topical Terms: World history LC Class. No.: D20 / .R65 2013