Παραπομπή σε μορφή APA (7η εκδ.)

Horowitz, B. (2014). Hard things about hard things: Building business when there are no easy answers. Harper Business.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. New York: Harper Business, 2014.

Παραπομπή σε μορφή MLA (9th εκδ.)

Horowitz, Ben. Hard Things About Hard Things: Building Business When There Are No Easy Answers. Harper Business, 2014.