Duhigg, C. (2013). The Power of Habit. RANDOM HOUSE BOOK, LONDON.
Lua i Stíl Chicago (17ú heag.)Duhigg, Charles. The Power of Habit. RANDOM HOUSE BOOK, LONDON, 2013.
Lua MLA (9ú heag.)Duhigg, Charles. The Power of Habit. RANDOM HOUSE BOOK, LONDON, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.