elshafei, a. n., & el-imam m. m. (1969). an attempt to develop a method for generating random numbers applicable to quality control. faculty of engineering.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)elshafei, alwalid n., و el-imam m. m. An Attempt to Develop a Method for Generating Random Numbers Applicable to Quality Control. cairo: faculty of engineering, 1969.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)elshafei, alwalid n., و el-imam m. m. An Attempt to Develop a Method for Generating Random Numbers Applicable to Quality Control. faculty of engineering, 1969.