U.S. Library of Congress. Legislative Reference Service & U.s. Congress. House. Committee on Government Operations. (1956). Intergovernmental relations in the United States: A selected bibliography. U.S. Govt. Print. Off.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)U.S. Library of Congress. Legislative Reference Service و U.s. Congress. House. Committee on Government Operations. Intergovernmental Relations in the United States: A Selected Bibliography. Washington: U.S. Govt. Print. Off, 1956.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)U.S. Library of Congress. Legislative Reference Service و U.s. Congress. House. Committee on Government Operations. Intergovernmental Relations in the United States: A Selected Bibliography. U.S. Govt. Print. Off, 1956.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.