1Parasuraman A, Zeithaml V A, Berry L L. Servqual= A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality [ J ]. Journal of Retailing, 1988, 64 (1): 12 -40.
2Caruana A, Ewing M T, Ramaseshan B. Assessment of the Three Column Format SERVQUAL: An Experimental [J]. Journal of Business Research, 2000, 49 (2): 5?-65.
3Zeithaml V A, Parasuraman A, Malhotra A. E-S-QUAL: A Multiple Item Scale for Assessing Electronic Service Quality [ J ]. Journal of Service Research, 2005, ? (3): 2]3-233.
4The National Science Digital Library [ EB/OL]. [2014-02 -23]. https: //nsdl. org/.
5Chowdhury G. From Digital Libraries to Digital Preservation Research: The Importance of Users and Context [J] .Journal of Documentation, 2010, 66 (2): 207-223.