Xu, Jun E-business in the 21st century : essential topics and studies - 2 - Singapore, World Scientific, 2021. - x, 400 p. - Intelligent information systems ; vol. 7 . - Intelligent information systems ; v. 7. . ISBN: 9789811231834 Subjects--Topical Terms: Electronic commerce.Customer relations--Management.Customer relations--Management.Electronic commerce. Dewey Class. No.: 658.872 XU/E