Gaya APA

Koch, C, G. (2015). Good Profit: How To Creating Value For Others Build One Of The World's Most Successfull Companies (Cetakan Kesepuluh). New York: Crown Business.

Gaya MLA

Koch, Charles, G.. "Good Profit: How To Creating Value For Others Build One Of The World's Most Successfull Companies". Cetakan Kesepuluh New York: Crown Business, 2015. Text.