APA

Palmer R. R., . (1953). A history of the modern world. New York: Knopf.

Chicago

Palmer R R, . 1953. A history of the modern world. New York: Knopf.

Harvard

Palmer R. R., . (1953). A history of the modern world. New York: Knopf.

MLA

Palmer R R, . A history of the modern world. New York: Knopf. 1953.