Gladwell, M. (2009). The tipping point: How little things can make a big difference. Abacus.
Lua i Stíl Chicago (17ú heag.)Gladwell, Malcolm. The Tipping Point: How Little Things Can Make a Big Difference. London: Abacus, 2009.
Lua MLA (9ú heag.)Gladwell, Malcolm. The Tipping Point: How Little Things Can Make a Big Difference. Abacus, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.