Khalil,Tarek. (1999). Civilization, Modern Technology and Sustainable Development (1.). Institute of National planning.
Cytowanie według stylu Chicago (wyd. 17)Khalil,Tarek. Civilization, Modern Technology and Sustainable Development. 1. Cairo: Institute of National planning, 1999.
Cytowanie według stylu MLA (wyd. 9)Khalil,Tarek. Civilization, Modern Technology and Sustainable Development. 1. Institute of National planning, 1999.