Dhillon,Nellie. (2005). Who Am I? 100 Historic inventions and discoveries of the World (NA.). Wisdom Tree.
Chicago-referens (17:e uppl.)Dhillon,Nellie. Who Am I? 100 Historic Inventions and Discoveries of the World. NA. New Delhi: Wisdom Tree, 2005.
MLA-referens (9:e uppl.)Dhillon,Nellie. Who Am I? 100 Historic Inventions and Discoveries of the World. NA. Wisdom Tree, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.