United States Agency for International Development. (1992). Barriers to entry study: Final report. SGV Consulting.
芝加哥风格引文United States Agency for International Development. Barriers to Entry Study: Final Report. Manila: SGV Consulting, 1992.
MLA引文United States Agency for International Development. Barriers to Entry Study: Final Report. SGV Consulting, 1992.
警告：这些引文格式不一定是100％准确.