Horowitz Ben. (2014). The hard thing about hard things: Building a business when there are no easy answers. HarperCollins.
Chicago-referens (17:e uppl.)Horowitz Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: HarperCollins, 2014.
MLA-referens (9:e uppl.)Horowitz Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. HarperCollins, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.