2Hovland C I, Weiss W. The influence of source credibility on communication effectiveness[J]. Public opinion quarter- ly, 1951, 15(4): 635-650.
3Gaziano C, McGrath K. Measuring the concept of credibility[J]. Journalism Quarterly, 1986, 63(3): 451-462.
4Ohanian R. Construction and validation of a scale to measure celebrity endorsers" perceived expertise, trustworthi- ness, and attractiveness[J]. Journal of Advertising, 1990, 19(3): 39-52.
5Marcus G E, Sullivan J L, Theiss-Morse E(Ed. ). With malice toward some: how people make civil liberties judg- ments[M]. New York: Cambridge University Press, 1995:114-133.
6Zaller J R. The nature and origins of mass epinion[M]. New York: Cambridge university press, 1992:6-40.
8Wilson T D. Human information behavior[J]. Informing science, 2000, 3(2) : 49-56.
9Franco M, Haase H, Magrinho A, et al. Scanning practices and information sources: an empirical study of firm size [J]. Journal of Enterprise nformation Management, 2011, 24(3): 268-287.
10Shannon C E. A mathematical theory of communication[J]. ACM SIGMOBILE Mobile Computing and Communications Review, 2001, 5(1): 3-55.
