Tim harford. (2017). Fifty Things That Made the Modern Economy. Little Brown.
Chicago-referens (17:e uppl.)Tim harford. Fifty Things That Made the Modern Economy. UK: Little Brown, 2017.
MLA-referens (9:e uppl.)Tim harford. Fifty Things That Made the Modern Economy. Little Brown, 2017.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.