APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Penrose, E. F., Peter Lyon, and Edith Tilton Penrose. New Orientations: Essays in International Relations. London: Cass, 1970.

MLA (9th ed.) Citation

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