APA (7th ed.) Citation

Luard & Heater. (1994). The United Nations: How it works and what it does (2nd ed.). The Macmillan Press.

Chicago Style (17th ed.) Citation

Luard and Heater. The United Nations: How It Works and What It Does. 2nd ed. Houndmills: The Macmillan Press, 1994.

MLA (8th ed.) Citation

Luard and Heater. The United Nations: How It Works and What It Does. 2nd ed. The Macmillan Press, 1994.