Cita APA (7th ed.)

Penrose, E. F., Lyon, P., & Penrose, E. T. (1970). New orientations: Essays in international relations. Frank Cass.

Cita Chicago (17th ed.)

Penrose, E. F., Peter Lyon, i Edith Tilton Penrose. New Orientations: Essays in International Relations. [London]: Frank Cass, 1970.

Cita MLA (9th ed.)

Penrose, E. F., et al. New Orientations: Essays in International Relations. Frank Cass, 1970.