8Bradac, J., E. Friedman & H. Giles. 1986. A social approach to propositional communication: speakerslieto hearers[A]. In G. McGregor (ed.). Language for Hearers [C]. Oxford Pergamon.
9Bull, P. & K. Mayer. 1993. How not to answer questions in political interviews [J]. Political Psychology 14: 651-666.
10Clayrnan, S. E. 2001. Answers and evasions [J]. Language in Society 30: 403-442.
5Banning,Stephan,Billingsley,Susan,2007.Journalist Aggressiveness in Joint Versus Solo Presidential Press Conferences.Mass Communication&Society 10(4),461-478.
6Clayman,Steven,2006.Arenas of Interaction in the New Media Era.Cambridge University Press,Cambridge.239-264.
7Clayman,Steven,Heritage,John,2002.Questioning Presidents:Journalistic Deference and Adversarianlness in the PressConferences of U.S Presidents Eisenhower and Reagan.Journal of Communication 52(4),749-775.
8Esbaugh-Soha,Matthew,2003.Presidential Press Conferences Over Time.American Journal of Political Science 47(2),348-353.
