Demand for Secret Shoppers Rises

http://www.scmp.com/business/companies/article/2114137/demand-mystery-shoppers-rises-banks-shops-want-better-service

How To Effectively & Legally Implement Secret Shoppers To Improve Company Customer Service

http://smallbusinesspulse.com/2016/11/21/secret-shoppers-improve-customer-service/

11 Benefits of Mystery Shops For Retailers

https://www.retaildoc.com/mystery-shop-retail

A Secret look at Service

http://archives.midweek.com/content/columns/entrepreneurs_article/a_secret_look_at_store_service/