singer, h. w. (1962). choic of technology. the institute of national planning.
芝加哥风格引文singer, h. w. Choic of Technology. cairo: the institute of national planning, 1962.
MLA引文singer, h. w. Choic of Technology. the institute of national planning, 1962.
警告：这些引文格式不一定是100％准确.