1. Mobile Taiwan: A look at A Highly Mobile Markethttps://www.emarketer.com/Article/Mobile-Taiwan-Look-Highly-Mobile-Market/1014877?ecid=NL1007
2. 2019 The Internet Report in Taiwan,2019
3. Marriott International, Inc. 2018 Annual Report;Marriott,2018
4. Mobile shopping behaviour: insights into attitudes, shopping process involvement and location
5. 5 Disadvantages of Handling Cashhttps://www.asiaone.com/money/5-disadvantages-handling-cash