APA (7th ed.) Citation

Waltz, K. N. (1981). The spread of nuclear weapons: More may be better. International Institute for Strategic Studies.

Chicago Style (17th ed.) Citation

Waltz, Kenneth N. The Spread of Nuclear Weapons: More May Be Better. London: International Institute for Strategic Studies, 1981.

MLA (9th ed.) Citation

Waltz, Kenneth N. The Spread of Nuclear Weapons: More May Be Better. International Institute for Strategic Studies, 1981.