United States. Agency for International Development. (1971). U.S. AID development assistance to the Republic of the Philippines, fiscal year 1971. [s.n.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Agency for International Development. U.S. AID Development Assistance to the Republic of the Philippines, Fiscal Year 1971. Manila: [s.n.], 1971.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Agency for International Development. U.S. AID Development Assistance to the Republic of the Philippines, Fiscal Year 1971. [s.n.], 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.