APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.