References
- ^ Mystery worshipers test church
- ^ Career Knowtes: Mystery Shopping by Kailin Gow
- ^ Dees J., Mystery Shoppers: Dispelling The Mystery
- ^ Health Care Taps 'Mystery Shoppers' at Wall Street Journal, August 8, 2006
- ^ Mystery shopping: Billion dollar industry keeps retailers in check
- ^ AMA: Ethical and Judical Affairs Report (Pages 18-20)
- ^ Market, opinion and social research
- ^ Giving the Bounce to Counterfeit Check Scams
- ^ Residents warned of job ad scam