3ISO/IEC.9241-11 Ergonomic Requirements for Office Work with Visual Display Terminals (VDT)s-Part 11 Guidance on Usability.1998:ISO/IEC 9241-11:1998 (E).
5Whitney Quesenbery.Balancing the 5Es:Usability[J].Cutter Information LLC,2004.(2):26-28.
6Whitney Quesenbery.Building Documentation Into the Interface:A Cognitive Theory[EB/OL].http://www.stc.org/confproceed/1997/PDFs/PG295-.PDF,1997-09-15.