Citação norma APA

Horowitz, B. (2011). The hard thing about hard things: Building a business when there are no easy answers. New York: Crown Business.

Citação norma Chicago

Horowitz, Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: Crown Business, 2011.

Citação norma MLA

Horowitz, Ben. The Hard Thing About Hard Things: Building a Business When There Are No Easy Answers. New York: Crown Business, 2011.

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