Horowitz, B. (2014). Hard things about hard things: Building business when there are no easy answers. Harper Business.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. New York: Harper Business, 2014.
MLA -ийн эшлэл (9 дэх хэвлэлт)Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. Harper Business, 2014.
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