omar, a. (1970). on the maintance of a system of machines by one repairman. the institute of national planning.
芝加哥风格引文omar, ahmed. On the Maintance of a System of Machines by One Repairman. cairo: the institute of national planning, 1970.
MLA引文omar, ahmed. On the Maintance of a System of Machines by One Repairman. the institute of national planning, 1970.
警告：这些引文格式不一定是100％准确.