Horowitz, B. (2014). Hard things about hard things: Building business when there are no easy answers. Harper Business.
Chicago-čujuhus (17. p.)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. New York: Harper Business, 2014.
MLA-čujuhus (9. p.)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. Harper Business, 2014.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.