United States. Agency for International Development. (1971). U.S. AID development assistance to the Republic of the Philippines, fiscal year 1971. [s.n.].
芝加哥风格引文United States. Agency for International Development. U.S. AID Development Assistance to the Republic of the Philippines, Fiscal Year 1971. Manila: [s.n.], 1971.
MLA引文United States. Agency for International Development. U.S. AID Development Assistance to the Republic of the Philippines, Fiscal Year 1971. [s.n.], 1971.
警告：这些引文格式不一定是100％准确.