Cita APA (7th ed.)

Khalil,Tarek. (1999). Civilization, Modern Technology and Sustainable Development (1.). Institute of National planning.

Cita Chicago (17th ed.)

Khalil,Tarek. Civilization, Modern Technology and Sustainable Development. 1. Cairo: Institute of National planning, 1999.

Cita MLA (9th ed.)

Khalil,Tarek. Civilization, Modern Technology and Sustainable Development. 1. Institute of National planning, 1999.

Atenció: Aquestes cites poden no estar 100% correctes.