Abd El-Aziz, D., & El Kafrawy, M. (1990). Comparison between pumps which work by solar energy electricity, and diesel. Arab republic of Egypt. The institute of National Planning.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Abd El-Aziz, Durria, và M. El Kafrawy. Comparison Between Pumps Which Work by Solar Energy Electricity, and Diesel. [Cairo]: Arab republic of Egypt. The institute of National Planning, 1990.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Abd El-Aziz, Durria, và M. El Kafrawy. Comparison Between Pumps Which Work by Solar Energy Electricity, and Diesel. Arab republic of Egypt. The institute of National Planning, 1990.