APA (7th ed.) Citation

Reichheld, F. F., & Markey, R. (2011). The ultimate question 2.0: How net promoter companies thrive in a customer-driven world (Rev. and expanded ed.). Harvard Business Press.

Chicago Style (17th ed.) Citation

Reichheld, Frederick F., and Rob Markey. The Ultimate Question 2.0: How Net Promoter Companies Thrive in a Customer-driven World. Rev. and expanded ed. Boston, Mass.: Harvard Business Press, 2011.

MLA (8th ed.) Citation

Reichheld, Frederick F., and Rob Markey. The Ultimate Question 2.0: How Net Promoter Companies Thrive in a Customer-driven World. Rev. and expanded ed. Harvard Business Press, 2011.