APA (7th ed.) Citation

Roberts, J. M. (1981). The Pelican history of the world (Revised edition.). Penguin Books Ltd.

Chicago Style (17th ed.) Citation

Roberts, J. M. The Pelican History of the World. Revised edition. Harmondsworth, England: Penguin Books Ltd, 1981.

MLA (9th ed.) Citation

Roberts, J. M. The Pelican History of the World. Revised edition. Penguin Books Ltd, 1981.