APA

Pratt J. W., . (1955). A history of United States foreign policy. New York: Prentice-Hall.

Chicago

Pratt Julius William, . 1955. A history of United States foreign policy. New York: Prentice-Hall.

Harvard

Pratt J. W., . (1955). A history of United States foreign policy. New York: Prentice-Hall.

MLA

Pratt Julius William, . A history of United States foreign policy. New York: Prentice-Hall. 1955.