Elshafei, A. (1969). Statistical Distributions and Random Sampling: Exponential Distribution and Extensions. The Institute of National Planning.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Elshafei, Alwalid. Statistical Distributions and Random Sampling: Exponential Distribution and Extensions. Cairo: The Institute of National Planning, 1969.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Elshafei, Alwalid. Statistical Distributions and Random Sampling: Exponential Distribution and Extensions. The Institute of National Planning, 1969.