Eckaus, R. S. (1977). Appropriate technologies for developing countries. National Academy of Sciences.
芝加哥风格引文Eckaus, Richard S. Appropriate Technologies for Developing Countries. Washington: National Academy of Sciences, 1977.
MLA引文Eckaus, Richard S. Appropriate Technologies for Developing Countries. National Academy of Sciences, 1977.
警告：这些引文格式不一定是100％准确.