APA (7th ed.) Citation

Nicolson, H. H. G. (1950). Diplomacy (2d ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Nicolson, Hon. Harold George. Diplomacy. 2d ed. London: Oxford University Press, 1950.

MLA (9th ed.) Citation

Nicolson, Hon. Harold George. Diplomacy. 2d ed. Oxford University Press, 1950.