Cita APA (7th ed.)

Perkins, D. (1952). The American approach to foreing policy. Harvard University.

Cita Chicago (17th ed.)

Perkins, Dexter. The American Approach to Foreing Policy. Cambridge, Massachussetts: Harvard University, 1952.

Cita MLA (9th ed.)

Perkins, Dexter. The American Approach to Foreing Policy. Harvard University, 1952.