elsharkawy, a. i. (1990). Renewable energy sources.
芝加哥风格引文elsharkawy, abdullatif i. Renewable Energy Sources. cairo, 1990.
MLA引文elsharkawy, abdullatif i. Renewable Energy Sources. 1990.
警告：这些引文格式不一定是100％准确.
APA引文
elsharkawy, a. i. (1990). Renewable energy sources.
芝加哥风格引文elsharkawy, abdullatif i. Renewable Energy Sources. cairo, 1990.
MLA引文elsharkawy, abdullatif i. Renewable Energy Sources. 1990.