Horowitz, B. (2014). Hard things about hard things: Building business when there are no easy answers. Harper Business.
芝加哥风格引文Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. New York: Harper Business, 2014.
MLA引文Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. Harper Business, 2014.
警告：这些引文格式不一定是100％准确.