APA
Ponting C., . (1999). The twentieth century : a world history. New York: A John Macrae Book ; Henry Holt and Company.
Chicago
Ponting Clive, . 1999. The twentieth century : a world history. New York: A John Macrae Book ; Henry Holt and Company.
Harvard
Ponting C., . (1999). The twentieth century : a world history. New York: A John Macrae Book ; Henry Holt and Company.
MLA
Ponting Clive, . The twentieth century : a world history. New York: A John Macrae Book ; Henry Holt and Company. 1999.
