Cita APA (7a ed.)

(1956). The North Atlantic Treaty Organization (4th ed.). [s.n.].

Cita Chicago Style (17a ed.)

The North Atlantic Treaty Organization. 4th ed. Paris: [s.n.], 1956.

Cita MLA (9a ed.)

The North Atlantic Treaty Organization. 4th ed. [s.n.], 1956.