Gaya APA

Berkowski, G. (2017). How to Build a Billion Dollar App: Discover The Secrets of The Most Successful Entrepreneurs of Our Time (Revised edition. Cetakan 1). London: Hachette Book Group.

Gaya MLA

Berkowski, George,. "How to Build a Billion Dollar App: Discover The Secrets of The Most Successful Entrepreneurs of Our Time". Revised edition. Cetakan 1 London: Hachette Book Group, 2017. Text.