Murphy, Dr. David S., and Dr. Scott Yetmar. “An Expected Value Analysis Of The Role Of Secret Shoppers In Combating Petty Corruption”. International Journal Of Management And Economics Invention 2, no. 08 (August 2, 2016): 710–715. Accessed May 8, 2024. http://www.rajournals.in/index.php/ijmei/article/view/257.