3Yinghua Huang,Choton Basu,Maxwell K.Hsu.Exploring Moti-vations of Travel Knowledge Sharing on Social Network Sites:AnEmpirical Investigation of U.S.College Students [J].Journal ofHospitality Marketing & Management.2010,19(7);717-734.
4Zheng Xiang,Ulrike Gretzel.Role of social media in online travelinformation search[J].2010,31(2):179-188.
5Gross R,Acquisti A.Information Revelation and Privacy in On-line Social Networks [M].WPES,Alexandria,Virginia,USA,November7,2005.