APA

Barck O. T., Blake N. M., . (1959). Since 1900: a history of the United States in our times. New York: Macmillan.

Chicago

Barck Oscar Theodore, Blake Nelson Manfred, . 1959. Since 1900: a history of the United States in our times. New York: Macmillan.

Harvard

Barck O. T., Blake N. M., . (1959). Since 1900: a history of the United States in our times. New York: Macmillan.

MLA

Barck Oscar Theodore, Blake Nelson Manfred, . Since 1900: a history of the United States in our times. New York: Macmillan. 1959.