APA

Beard C. A., . (1940). A foreign policy for America. New York: Knopf.

Chicago

Beard Charles Austin, . 1940. A foreign policy for America. New York: Knopf.

Harvard

Beard C. A., . (1940). A foreign policy for America. New York: Knopf.

MLA

Beard Charles Austin, . A foreign policy for America. New York: Knopf. 1940.