APA (7th ed.) Citation

Nicolson, H. (1939). Diplomacy (1. publ.). Butterworth.

Chicago Style (17th ed.) Citation

Nicolson, Harold. Diplomacy. 1. publ. London: Butterworth, 1939.

MLA (9th ed.) Citation

Nicolson, Harold. Diplomacy. 1. publ. Butterworth, 1939.

Warning: These citations may not always be 100% accurate.