Butterfield, S. H. (2004). U.S. development aid--an historic first: Achievements and failures in the twentieth century. Praeger Publishers.
芝加哥风格引文Butterfield, Samuel Hale. U.S. Development Aid--an Historic First: Achievements and Failures in the Twentieth Century. Westport, Conn.: Praeger Publishers, 2004.
MLA引文Butterfield, Samuel Hale. U.S. Development Aid--an Historic First: Achievements and Failures in the Twentieth Century. Praeger Publishers, 2004.
警告：这些引文格式不一定是100％准确.