Reichheld, F. (2006). The Ultimate Question. HBR Press.
芝加哥风格引文Reichheld, Fred. The Ultimate Question. Boston: HBR Press, 2006.
MLA引文Reichheld, Fred. The Ultimate Question. HBR Press, 2006.
警告：这些引文格式不一定是100％准确.
APA引文
Reichheld, F. (2006). The Ultimate Question. HBR Press.
芝加哥风格引文Reichheld, Fred. The Ultimate Question. Boston: HBR Press, 2006.
MLA引文Reichheld, Fred. The Ultimate Question. HBR Press, 2006.