APA

Roberst J. M., . (2007). The new Penguin history of the world. London: Penguin Books.

Chicago

Roberst John Morris, . 2007. The new Penguin history of the world. London: Penguin Books.

Harvard

Roberst J. M., . (2007). The new Penguin history of the world. London: Penguin Books.

MLA

Roberst John Morris, . The new Penguin history of the world. London: Penguin Books. 2007.