Horowitz, B. (2014). The hard thing about hard things: Building a business when there are no easy answers. New York: HarperCollins Publishers.
Trích dẫn kiểu ChicagoHorowitz, Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: HarperCollins Publishers, 2014.
Trích dẫn MLAHorowitz, Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: HarperCollins Publishers, 2014.
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