توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Willetts, P. (1996). The conscience of the world: The influence of non-governmental organisations in the UN system. Brookings Institution for the David Davies Memorial Institute of International Studies, London.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Willetts, Peter. The Conscience of the World: The Influence of Non-governmental Organisations in the UN System. Washington, DC: Brookings Institution for the David Davies Memorial Institute of International Studies, London, 1996.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Willetts, Peter. The Conscience of the World: The Influence of Non-governmental Organisations in the UN System. Brookings Institution for the David Davies Memorial Institute of International Studies, London, 1996.