APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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

Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.