Gaya APA

Zilko, D. (2016). Irrational persistence : seven secrets that turned a bankrupt startup into a $231,000,000 business . Hoboken, NJ: Wiley.

Gaya MLA

Zilko, Dave. "Irrational persistence : seven secrets that turned a bankrupt startup into a $231,000,000 business". Hoboken, NJ: Wiley, 2016. Text.