Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Pratt, Julius W. A History of United States Foreign Policy. Nueva York: Prentice-Hall, 1955.

Cita MLA (9th ed.)

Pratt, Julius W. A History of United States Foreign Policy. Prentice-Hall, 1955.