MLA

Lippmann, Walter. U.s. Foreign Policy : Shield of the Republic. Boston: Little, Brown and Company, 1943.

APA

Lippmann, W. (1943). U.S. Foreign Policy : Shield of the Republic. Boston: Little, Brown and Company.

Chicago

Lippmann, Walter U.S. Foreign Policy: Shield of the Republic. Boston: Little, Brown and Company, 1943.