Gaya APA

Barck, O, T., Manfred, I, B, N. (1965). Since 1900 a history of united states in our times . New York: New York: The Macmillan Company; 1965.

Gaya MLA

Barck, Oscar, Theodore., Manfred, I., Blake,, Nelson. "Since 1900 a history of united states in our times". New York: New York: The Macmillan Company; 1965, 1965. Text.