Cita APA (7th ed.)

elsharkawy, a. i. (1990). Renewable energy sources.

Cita Chicago (17th ed.)

elsharkawy, abdullatif i. Renewable Energy Sources. cairo, 1990.

Cita MLA (9th ed.)

elsharkawy, abdullatif i. Renewable Energy Sources. 1990.

Atenció: Aquestes cites poden no estar 100% correctes.