APA (7th ed.) Citation

Nicolson, H. (1950). Diplomacy (2. ed.). Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Nicolson, Harold. Diplomacy. 2. ed. London [u.a.]: Oxford Univ. Press, 1950.

MLA (9th ed.) Citation

Nicolson, Harold. Diplomacy. 2. ed. Oxford Univ. Press, 1950.