6Leech, G. Principles of Pragmatics[M]. London: Longman, 1983.
7Brown, P. & S. Levinson. Universals in language usage: politeness phenomena[A]. E. Goody. Questions and Politeness: Strategies in Social Interaction[C]. Cambridge: Cambridge University Press, 1978. 56-289.
8Blackburn, William. Ambiguity and non-specificity: a reply to Jay David Atlas[J]. Linguistics and Philosophy, 1983, (6): 479-498.
9Fredsted, Elin. On semantic and pragmatic ambiguity[J]. Journal of Pragmatics, 1998, 30: 527-541.
10Thomas, J. Meaning in Interaction: An Introduction to Pragmatics[M]. London and New York: Longman, 1995.
