7[6]Linda Harasim . Online Education:The Future[A]. Teresa M . Harrison, Timothy Stephen. Computer Networking and Scholarly Communication in the Twenty-First-Century University[C]. New York:State University of New York Press, 1996.
8[7]Steven Ryan,Beruard Scott,Howard Freeman & Daxa Patel. The Virtual University: The Internet and Resource-Based Learning[M]. London: Kogan Page Limited,2000.
