APA (7th ed.) Citation

Gladwell, M. (2011). The tipping point: How little things can make a big difference (Repr.). Little, Brown.

Chicago Style (17th ed.) Citation

Gladwell, Malcolm. The Tipping Point: How Little Things Can Make a Big Difference. Repr. London: Little, Brown, 2011.

MLA (9th ed.) Citation

Gladwell, Malcolm. The Tipping Point: How Little Things Can Make a Big Difference. Repr. Little, Brown, 2011.