Citação norma APA

Horowitz Ben. (2014). The hard thing about hard things: Building a business when there are no easy answers. HarperCollins.

Citação norma Chicago

Horowitz Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: HarperCollins, 2014.

Citação norma MLA

Horowitz Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. HarperCollins, 2014.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.