APA (7th ed.) Citation

Reichheld, F. (2006). The Ultimate Question. HBR Press.

Chicago Style (17th ed.) Citation

Reichheld, Fred. The Ultimate Question. Boston: HBR Press, 2006.

MLA (9th ed.) Citation

Reichheld, Fred. The Ultimate Question. HBR Press, 2006.

Warning: These citations may not always be 100% accurate.