Anderson, R. (2011). Fifty hats that changed the world. Conran Octopus in association with The Design Museum.
Chicago-referens (17:e uppl.)Anderson, Robert. Fifty Hats That Changed the World. London: Conran Octopus in association with The Design Museum, 2011.
MLA-referens (9:e uppl.)Anderson, Robert. Fifty Hats That Changed the World. Conran Octopus in association with The Design Museum, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.