Jack, W. 1. (1992). Power sharing and pollution control: Coordinating policies among levels of government. Country Economics Department, World Bank.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jack, William 1964. Power Sharing and Pollution Control: Coordinating Policies Among Levels of Government. Washington, D.C: Country Economics Department, World Bank, 1992.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Jack, William 1964. Power Sharing and Pollution Control: Coordinating Policies Among Levels of Government. Country Economics Department, World Bank, 1992.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.