APA

Richards D., . (1948). An illustrated history of modern Europe, 1789-1939. New York: Longmans, Green and Co.

Chicago

Richards Denis, . 1948. An illustrated history of modern Europe, 1789-1939. New York: Longmans, Green and Co.

Harvard

Richards D., . (1948). An illustrated history of modern Europe, 1789-1939. New York: Longmans, Green and Co.

MLA

Richards Denis, . An illustrated history of modern Europe, 1789-1939. New York: Longmans, Green and Co. 1948.