Harford,Tim. (2017). Fifty things that made the modern economy (NA.). Little,Brown.
Lua i Stíl Chicago (17ú heag.)Harford,Tim. Fifty Things That Made the Modern Economy. NA. UK: Little,Brown, 2017.
Lua MLA (9ú heag.)Harford,Tim. Fifty Things That Made the Modern Economy. NA. Little,Brown, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.