Horowitz, B. (2014). Hard things about hard things: Building business when there are no easy answers. Harper Business.
Lua i Stíl Chicago (17ú heag.)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. New York: Harper Business, 2014.
Lua MLA (9ú heag.)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. Harper Business, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.