APA

Howard M. E., Louis W. R., . (1988). The Oxford History of the Twentieth Century. New York: Oxford.

Chicago

Howard Michael Elliot, Louis William Roger, . 1988. The Oxford History of the Twentieth Century. New York: Oxford.

Harvard

Howard M. E., Louis W. R., . (1988). The Oxford History of the Twentieth Century. New York: Oxford.

MLA

Howard Michael Elliot, Louis William Roger, . The Oxford History of the Twentieth Century. New York: Oxford. 1988.